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NCT Number: NCT07305103

Defining Dosimetric Reference Levels in Computed Tomography Spectral Scanning

Spectral computed tomography or dual-energy CT imaging can overcome the limitations of conventional CT in differentiating between two materials with equivalent total attenuation. It can generate several types of images, such as virtual monochromatic images, which improve the contrast-to-noise ratio for low energy levels and reduce artifacts for high energy levels. It also allows for quantitative image analysis and thus better characterization of lesions and tissues through material mapping (e.g., iodinated contrast agent mapping). This technique is increasingly used in routine clinical practice thanks to improvements in image flow management and technological advances. It also involves exposing patients to ionizing radiation, as with conventional CT but, unlike conventional CT scans, for which dosimetric reference levels (RLs) are defined for the most common examinations in France (RL decree dated 2019), there are currently no dosimetric reference levels for examinations performed using this technique. Yet RLs are an important and effective tools for optimizing patient exposure to ionizing radiation. Several articles were published between 2012 and 2017 when the first dual-energy scanners arrived in clinics. However, the results presented in these studies are now far removed from recent practices, as they do not take into account the latest technological developments used in dual-energy scanners, which reduce X-ray doses.

The main objective of the study is to define dosimetric reference levels for the most commonly performed spectral computed tomography examinations in France.

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Key information

Conditions

Medical Imaging

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Nîmes University Hospital

Nîmes, Gard, 30029, France

About this study

Spectral computed tomography (CT) (or dual-energy CT) imaging can overcome the limitations of conventional CT in differentiating between two materials with equivalent total attenuation. It can generate several types of images, such as virtual monochromatic images, which improve the contrast-to-noise ratio for low energy levels and reduce artifacts for high energy levels. It also allows for quantitative image analysis and thus better characterization of lesions and tissues through material mapping (e.g., iodinated contrast agent mapping). This technique is increasingly used in routine clinical practice thanks to improvements in image flow management and technological advances. It also involves exposing patients to ionizing radiation, as with conventional CT.

However, unlike conventional CT scans, for which dosimetric reference levels (RLs) are defined for the most common examinations in France (RL decree dated 2019), there are currently no dosimetric reference levels for examinations performed using this technique. Yet the RL is an important and effective tool in optimizing patient exposure to ionizing radiation. In fact, a number of articles were published between 2012 and 2017, when the first dual-energy scanners arrived in clinics. However, the results presented in these studies are now far removed from recent practices, as they do not take into account the latest technological developments used in dual-energy scanners, which reduce X-ray doses.

The main objective of the study is to define dosimetric reference levels for the most frequently performed spectral computed tomography examinations in France:

  • Chest CT for pulmonary embolism
  • Chest CT for other indications
  • Coronary CT with contrast injection and retrospective gating
  • Coronary CT with contrast injection and prospective gating
  • Cranial CT with contrast injection
  • Supra-aortic trunk CT
  • Neck and ear,nose and throat sphere CT with contrast injection
  • Oncological abdomen-pelvis CT scan
  • Abdomen-pelvis CT scan to check for kidney stones
  • Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones
  • Oncological chest-abdomen-pelvis CT scan
  • Non-oncological chest-abdomen-pelvis CT scan
  • Oncological chest-abdomen CT scan
  • Non-oncological chest-abdomen CT scan
  • Lower limb angiography
  • Cervical spine CT scan
  • Thoracic spine CT scan
  • Lumbar spine CT scan
  • Pelvis CT scan,
  • Extremities CT scan

The secondary objectives of the study are to evaluate, for each examination performed:

  • the impact of the spectral acquisition/detection technique on the dose delivered to patients.
  • the impact of patients' BMI on the dose delivered to patients.
  • the impact of reconstruction algorithms on the dose delivered to patients.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adult male/female patient (≥ 18 years old)
  • Body Mass Index (BMI) between 18 and 35 kg/m²
  • Patients who underwent a spectral CT scan between January 1, 2023, and August 31, 2024, as part of their treatment.

Exclusion criteria

  • Pregnant women

Treatment and study plan

Spectral ComputedTomography

Radiation

Commonly performed spectral computed tomography examinations in France

Primary outcomes

  1. Dosimetric reference levels for spectral computed tomography examinations in France: Chest CT for pulmonary embolism. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  2. Dosimetric reference levels for spectral computed tomography examinations in France: Chest CT for pulmonary embolism. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  3. Dosimetric reference levels for spectral computed tomography examinations in France: Chest CT for other indications. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  4. Dosimetric reference levels for spectral computed tomography examinations in France: Chest CT for other indications. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  5. Dosimetric reference levels for spectral computed tomography examinations in France: Coronary CT with contrast injection and retrospective gating. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  6. Dosimetric reference levels for spectral computed tomography examinations in France: Coronary CT with contrast injection and prospective gating. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  7. Dosimetric reference levels for spectral computed tomography examinations in France: Cranial CT with contrast injection. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  8. Dosimetric reference levels for spectral computed tomography examinations in France: Cranial CT with contrast injection. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  9. Dosimetric reference levels for spectral computed tomography examinations in France: Supra-aortic trunk CT. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  10. Dosimetric reference levels for spectral computed tomography examinations in France: Supra-aortic trunk CT. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  11. Dosimetric reference levels for spectral computed tomography examinations in France: Neck and ear,nose and throat sphere CT with contrast injection. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  12. Dosimetric reference levels for spectral computed tomography examinations in France: Neck and ear,nose and throat sphere CT with contrast injection. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  13. Dosimetric reference levels for spectral computed tomography examinations in France: Oncological abdomen-pelvis CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  14. Dosimetric reference levels for spectral computed tomography examinations in France: Oncological abdomen-pelvis CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  15. Dosimetric reference levels for spectral computed tomography examinations in France: Abdomen-pelvis CT scan to check for kidney stones. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  16. Dosimetric reference levels for spectral computed tomography examinations in France: Abdomen-pelvis CT scan to check for kidney stones. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  17. Dosimetric reference levels for spectral computed tomography examinations in France: Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  18. Dosimetric reference levels for spectral computed tomography examinations in France: Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  19. Dosimetric reference levels for spectral computed tomography examinations in France: Oncological chest-abdomen-pelvis CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  20. Dosimetric reference levels for spectral computed tomography examinations in France: Oncological chest-abdomen-pelvis CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  21. Dosimetric reference levels for spectral computed tomography examinations in France: Non-oncological chest-abdomen-pelvis CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  22. Dosimetric reference levels for spectral computed tomography examinations in France: Non-oncological chest-abdomen-pelvis CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  23. Dosimetric reference levels for spectral computed tomography examinations in France: Oncological chest-abdomen CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  24. Dosimetric reference levels for spectral computed tomography examinations in France: Oncological chest-abdomen CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  25. Dosimetric reference levels for spectral computed tomography examinations in France: Non-oncological chest-abdomen CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  26. Dosimetric reference levels for spectral computed tomography examinations in France: Non-oncological chest-abdomen CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  27. Dosimetric reference levels for spectral computed tomography examinations in France: Lower limb angiography. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  28. Dosimetric reference levels for spectral computed tomography examinations in France: Lower limb angiography. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  29. Dosimetric reference levels for spectral computed tomography examinations in France: Cervical spine CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  30. Dosimetric reference levels for spectral computed tomography examinations in France: Cervical spine CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  31. Dosimetric reference levels for spectral computed tomography examinations in France: Thoracic spine CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  32. Dosimetric reference levels for spectral computed tomography examinations in France: Thoracic spine CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  33. Dosimetric reference levels for spectral computed tomography examinations in France: Lumbar spine CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  34. Dosimetric reference levels for spectral computed tomography examinations in France: Lumbar spine CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  35. Dosimetric reference levels for spectral computed tomography examinations in France: Pelvis CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  36. Dosimetric reference levels for spectral computed tomography examinations in France: Pelvis CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm

  37. Dosimetric reference levels for spectral computed tomography examinations in France: Extremities CT scan. CTDIvol

    Time frame: Periprocedural

    Computed tomography dose index (CTDIvol) per acquisition expressed in milligray (mGy).

  38. Dosimetric reference levels for spectral computed tomography examinations in France: Extremities CT scan. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm will be recorded

Secondary outcomes

  1. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for pulmonary embolism. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  2. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for pulmonary embolism. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  3. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for pulmonary embolism. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  4. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for pulmonary embolism. DLP

    Time frame: Periprocedural

    Dose length product (DLP) expressed in mGy.cm will be recorded.

  5. Impact of patients' BMI on the dose delivered to patients: Chest CT for pulmonary embolism. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  6. Impact of patients' BMI on the dose delivered to patients: Chest CT for pulmonary embolism. Acquisition parameters, kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  7. Impact of patients' BMI on the dose delivered to patients: Chest CT for pulmonary embolism. Acquisition parameters, mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  8. Impact of patients' BMI on the dose delivered to patients: Chest CT for pulmonary embolism. Acquisition parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  9. Impact of patients' BMI on the dose delivered to patients: Chest CT for pulmonary embolism. Acquisition parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  10. Impact of reconstruction algorithms on the dose delivered to patients : Chest CT for pulmonary embolism. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  11. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for other indications. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  12. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for other indications. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  13. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for other indications. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  14. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Chest CT for other indications. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  15. Impact of patients' BMI on the dose delivered to patients: Chest CT for other indications. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  16. Impact of patients' BMI on the dose delivered to patients: Chest CT for other indications. Acquisition parameters, kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  17. Impact of patients' BMI on the dose delivered to patients: Chest CT for other indications. Acquisition parameters, mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  18. Impact of patients' BMI on the dose delivered to patients: Chest CT for other indications. Acquisition parameters, rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  19. Impact of patients' BMI on the dose delivered to patients: Chest CT for other indications. Acquisition parameters, helical pitch

    Time frame: Periprocedural

    Helical pitch time will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  20. Impact of reconstruction algorithms on the dose delivered to patients : Chest CT for other indications. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  21. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Coronary CT with contrast injection and retrospective gating. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  22. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Coronary CT with contrast injection and retrospective gating. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  23. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Coronary CT with contrast injection and retrospective gating. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  24. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Coronary CT with contrast injection and retrospective gating. DLP

    Time frame: Periprocedural

    The dose length product (DLP) will be recorded.

  25. Impact of patients' BMI on the dose delivered to patients : Coronary CT with contrast injection and retrospective gating. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  26. Impact of patients' BMI on the dose delivered to patients : Coronary CT with contrast injection and retrospective gating. Acquisition parameters, kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  27. Impact of patients' BMI on the dose delivered to patients : Coronary CT with contrast injection and retrospective gating. Acquisition parameters, mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  28. Impact of patients' BMI on the dose delivered to patients : Coronary CT with contrast injection and retrospective gating. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  29. Impact of patients' BMI on the dose delivered to patients : Coronary CT with contrast injection and retrospective gating. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  30. Impact of reconstruction algorithms on the dose delivered to patients : Coronary CT with contrast injection and retrospective gating. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  31. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cranial CT with contrast injection. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  32. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cranial CT with contrast injection. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  33. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cranial CT with contrast injection. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  34. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cranial CT with contrast injection. DLP

    Time frame: Periprocedural

    Dose length product (DLP) will be recorded.

  35. Impact of patients' BMI on the dose delivered to patients: Cranial CT with contrast injection. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  36. Impact of patients' BMI on the dose delivered to patients: Cranial CT with contrast injection. Acquisition parameters, kV

    Time frame: Periprocedural

    Acquisition parameters (kV)will be recorded

  37. Impact of patients' BMI on the dose delivered to patients: Cranial CT with contrast injection. Acquisition parameters, mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  38. Impact of patients' BMI on the dose delivered to patients: Cranial CT with contrast injection. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  39. Impact of patients' BMI on the dose delivered to patients: Cranial CT with contrast injection. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  40. Impact of reconstruction algorithms on the dose delivered to patients : Cranial CT with contrast injection. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  41. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Supra-aortic trunk CT. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded

  42. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Supra-aortic trunk CT. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded

  43. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Supra-aortic trunk CT. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  44. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Supra-aortic trunk CT. DLP

    Time frame: Periprocedural

    The dose (DLP) expressed in mGy.cm will be recorded.

  45. Impact of patients' BMI on the dose delivered to patients : Supra-aortic trunk CT. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  46. Impact of patients' BMI on the dose delivered to patients : Supra-aortic trunk CT. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  47. Impact of patients' BMI on the dose delivered to patients : Supra-aortic trunk CT. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  48. Impact of patients' BMI on the dose delivered to patients : Supra-aortic trunk CT. Acquisition parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  49. Impact of patients' BMI on the dose delivered to patients : Supra-aortic trunk CT. Acquisition parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  50. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Neck and ear, nose and throat sphere CT with contrast injection. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  51. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Neck and ear, nose and throat sphere CT with contrast injection. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  52. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Neck and ear, nose and throat sphere CT with contrast injection. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  53. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Neck and ear, nose and throat sphere CT with contrast injection. DLP

    Time frame: Periprocedural

    The dose (DLP) expressed in mGy.cm will be recorded

  54. Impact of patients' BMI on the dose delivered to patients : Neck and ear, nose and throat sphere CT with contrast injection. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  55. Impact of reconstruction algorithms on the dose delivered to patients : Neck and ear, nose and throat sphere CT with contrast injection. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  56. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological abdomen-pelvis CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisitions will be recorded.

  57. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological abdomen-pelvis CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  58. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological abdomen-pelvis CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  59. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological abdomen-pelvis CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded

  60. Impact of patients' BMI on the dose delivered to patients : Oncological abdomen-pelvis CT scan. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  61. Impact of patients' BMI on the dose delivered to patients : Oncological abdomen-pelvis CT scan. Acquisition parameters (kV)

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  62. Impact of patients' BMI on the dose delivered to patients : Oncological abdomen-pelvis CT scan. Acquisition parameters (mAs)

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  63. Impact of patients' BMI on the dose delivered to patients : Oncological abdomen-pelvis CT scan. Acquisition parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  64. Impact of patients' BMI on the dose delivered to patients : Oncological abdomen-pelvis CT scan. Acquisition parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  65. Impact of reconstruction algorithms on the dose delivered to patients: Oncological abdomen-pelvis CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  66. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan to check for kidney stones. Acquisition type an

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  67. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan to check for kidney stones. Number of acquisitions an

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  68. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan to check for kidney stones. CTDIvol an

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  69. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan to check for kidney stones. DLP an

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  70. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan to check for kidney stones. BMI an

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  71. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan to check for kidney stones. Acquisition parameters. Kv an

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  72. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan to check for kidney stones. Acquisition parameters. mAs an

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  73. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan to check for kidney stones. Rotation time an

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  74. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan to check for kidney stones. Helical pitch an

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  75. Impact of reconstruction algorithms on the dose delivered to patients : Abdomen-pelvis CT scan to check for kidney stones. Type of reconstruction algorithm an

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  76. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  77. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  78. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  79. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  80. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  81. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  82. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  83. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  84. Impact of patients' BMI on the dose delivered to patients : Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  85. Impact of reconstruction algorithms on the dose delivered to patients : Abdomen-pelvis CT scan for non-oncological purposes and to check for kidney stones. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  86. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen-pelvis CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  87. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen-pelvis CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  88. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen-pelvis CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  89. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen-pelvis CT scan. DLP

    Time frame: Periprocedural

    The dose (DLP) expressed in mGy.cm will be recorded.

  90. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen-pelvis CT scan. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  91. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen-pelvis CT scan. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  92. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen-pelvis CT scan. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  93. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen-pelvis CT scan. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  94. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen-pelvis CT scan. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  95. Impact of reconstruction algorithms on the dose delivered to patients : Oncological chest-abdomen-pelvis CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  96. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen-pelvis CT scan. Acquisition type.

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  97. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen-pelvis CT scan. Number of acquisitions.

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  98. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen-pelvis CT scan. CDTIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  99. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen-pelvis CT scan. CDTIvol. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  100. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen-pelvis CT scan. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  101. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen-pelvis CT scan. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  102. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen-pelvis CT scan. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  103. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen-pelvis CT scan. Acquisition parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  104. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen-pelvis CT scan. Acquisition parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  105. Impact of reconstruction algorithms on the dose delivered to patients : Non-oncological chest-abdomen-pelvis CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  106. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen CT scan. Aquisition type

    Time frame: Periprocedural

    The type of acquisitions will be recorded.

  107. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen CT scan. Number of aquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  108. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  109. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Oncological chest-abdomen CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  110. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen CT scan. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  111. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen CT scan. Acquisition parameters (kV)

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  112. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen CT scan. Acquisition parameters (mAs)

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  113. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen CT scan. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  114. Impact of patients' BMI on the dose delivered to patients : Oncological chest-abdomen CT scan. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  115. Impact of reconstruction algorithms on the dose delivered to patients : Oncological chest-abdomen CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  116. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  117. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  118. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  119. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Non-oncological chest-abdomen CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  120. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen CT scan

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  121. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen CT scan. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  122. Impact of patients' BMI on the dose delivered to patients : Non-oncological chest-abdomen CT scan. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  123. Impact of reconstruction algorithms on the dose delivered to patients: Non-oncological chest-abdomen CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  124. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lower limb angiography. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  125. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lower limb angiography. Number of acquitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  126. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lower limb angiography. CTDIvol

    Time frame: Periprocedural

    The dose CDTIvol) will be recorded.

  127. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lower limb angiography. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  128. Impact of patients' BMI on the dose delivered to patients : Lower limb angiography. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  129. Impact of patients' BMI on the dose delivered to patients : Lower limb angiography. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  130. Impact of patients' BMI on the dose delivered to patients : Lower limb angiography. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  131. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lower limb angiography. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds.

  132. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lower limb angiography. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio.This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  133. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lower limb angiography. Type of reconstruction algorithm

    Time frame: Periprocedural

    Type of reconstruction algorithm (iterative or deep learning) will be recorded

  134. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cervical spine CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  135. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cervical spine CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  136. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cervical spine CT scan. CDTIvol

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  137. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Cervical spine CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  138. Impact of patients' BMI on the dose delivered to patients : Cervical spine CT scan. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  139. Impact of patients' BMI on the dose delivered to patients : Cervical spine CT scan. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  140. Impact of patients' BMI on the dose delivered to patients : Cervical spine CT scan. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  141. Impact of patients' BMI on the dose delivered to patients : Cervical spine CT scan. Acquisition parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  142. Impact of patients' BMI on the dose delivered to patients : Cervical spine CT scan. Acquisition parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  143. Impact of reconstruction algorithms on the dose delivered to patients : Cervical spine CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  144. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Thoracic spine CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  145. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Thoracic spine CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisition will be recorded.

  146. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Thoracic spine CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  147. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Thoracic spine CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  148. Impact of patients' BMI on the dose delivered to patients : Thoracic spine CT scan. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  149. Impact of patients' BMI on the dose delivered to patients : Thoracic spine CT scan. Acquisition parameters (kV)

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  150. Impact of patients' BMI on the dose delivered to patients : Thoracic spine CT scan. Acquisition parameters (mAs)

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  151. Impact of patients' BMI on the dose delivered to patients : Thoracic spine CT scan. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  152. Impact of patients' BMI on the dose delivered to patients : Thoracic spine CT scan. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  153. Impact of reconstruction algorithms on the dose delivered to patients : Thoracic spine CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  154. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lumbar spine CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  155. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lumbar spine CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisition will be recorded.

  156. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lumbar spine CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  157. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Lumbar spine CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded

  158. Impact of patients' BMI on the dose delivered to patients : Lumbar spine CT scan. BMI

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  159. Impact of patients' BMI on the dose delivered to patients : Lumbar spine CT scan. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  160. Impact of patients' BMI on the dose delivered to patients : Lumbar spine CT scan. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  161. Impact of patients' BMI on the dose delivered to patients : Lumbar spine CT scan. Acquisition parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  162. Impact of patients' BMI on the dose delivered to patients : Lumbar spine CT scan. Acquisition parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  163. Impact of reconstruction algorithms on the dose delivered to patients: Lumbar spine CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  164. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Pelvis CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  165. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Pelvis CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  166. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Pelvis CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CDTIvol) will be recorded.

  167. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Pelvis CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded.

  168. Impact of patients' BMI on the dose delivered to patients : Pelvis CT scan. BMI.

    Time frame: Periprocedural

    Weight and height will be combined to report BMI in kg/m^2

  169. Impact of patients' BMI on the dose delivered to patients : Pelvis CT scan. Acquistion parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  170. Impact of patients' BMI on the dose delivered to patients : Pelvis CT scan. Acquistion parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  171. Impact of patients' BMI on the dose delivered to patients : Pelvis CT scan. Acquistion parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  172. Impact of patients' BMI on the dose delivered to patients : Pelvis CT scan. Acquistion parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  173. Impact of reconstruction algorithms on the dose delivered to patients : Pelvis CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

  174. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Extremities CT scan. Acquisition type

    Time frame: Periprocedural

    The type of acquisition will be recorded.

  175. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Extremities CT scan. Number of acquisitions

    Time frame: Periprocedural

    The number of acquisitions will be recorded.

  176. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Extremities CT scan. CTDIvol

    Time frame: Periprocedural

    The dose (CTDIvol) will be recorded.

  177. Impact of the spectral acquisition/detection technique on the dose delivered to patients: Extremities CT scan. DLP

    Time frame: Periprocedural

    The dose length product (DLP) expressed in mGy.cm will be recorded

  178. Impact of patients' BMI on the dose delivered to patients : Extremities CT scan. BMI

    Time frame: Periprocedural

    Weight in kg and height in cm in will be combined to report BMI in kg/m^2

  179. Impact of patients' BMI on the dose delivered to patients : Extremities CT scan. Acquisition parameters. kV

    Time frame: Periprocedural

    Acquisition parameters (kV) will be recorded

  180. Impact of patients' BMI on the dose delivered to patients : Extremities CT scan. Acquisition parameters. mAs

    Time frame: Periprocedural

    Acquisition parameters (mAs) will be recorded

  181. Impact of patients' BMI on the dose delivered to patients : Extremities CT scan. Acquisition parameters. Rotation time

    Time frame: Periprocedural

    Rotation time will be recorded in seconds

  182. Impact of patients' BMI on the dose delivered to patients : Extremities CT scan. Acquisition parameters. Helical pitch

    Time frame: Periprocedural

    Helical pitch will be recorded as a ratio. This represents the relationship between patient couch movement and X-ray beam width. It is the distance travelled by the table during one 360 degree gantry rotation divided by the collimated section thickness

  183. Impact of reconstruction algorithms on the dose delivered to patients: Extremities CT scan. Type of reconstruction algorithm

    Time frame: Periprocedural

    The type of reconstruction algorithm (iterative or deep learning) will be recorded

Sponsors and collaborators

Lead sponsor

Centre Hospitalier Universitaire de Nīmes

Other

Collaborators

  • Amiens University Hospital
  • Bichat Hospital
  • Centre Antoine Lacassagne, Nice
  • Centre Hospitalier Lyon Sud
  • Centre Hospitalier Universitaire de Saint Etienne
  • Centre Hospitalier de Valenciennes
  • Centre Léon Bérard, Lyon
  • Henri Mondor Hospital, Créteil
  • Hopital Lariboisière
  • Hopital Louis Pradel
  • Hôpital Edouard Herriot (GH Centre), Lyon
  • Hôpital Louis Mourier, 92700 Colombes
  • Hôpital Necker-Enfants Malades
  • Institut Curie
  • Institut Paoli Calmettes, Marseille
  • Nord Ardennes Intercommunal Hospital
  • Poitiers University Hospital
  • Saint Antoine University Hospital
  • Saint-Louis Hospital, Paris, France
  • University Hospital, Bordeaux
  • University Hospital, Lille

Registry information

Acronym: NR Spectral

Important dates

Study start
2025
Primary completion
2025
Study completion
2026
First posted
Dec 26, 2025
Registry last updated
Dec 26, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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