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NCT Number: NCT02397317

Stereotactic Prostate Adaptive Radiotherapy Utilising Kilovoltage Intrafraction Monitoring

The SPARK trial is testing the use of Kilovoltage Intrafraction Monitoring in prostate cancer patients being treated with Stereotactic Prostate Adaptive Radiotherapy. The researchers expect this trial to result in better targeted prostate cancer patient outcomes with lower toxicity. The potential application of Kilovoltage Intrafraction Monitoring to other tumour sites will pave the way for additional trials with Australasian radiation oncology leading the world.

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Key information

Conditions

Prostate Cancer Genital Diseases Genital Diseases, Male Genital Neoplasms, Male Male Urogenital Diseases Neoplasms Neoplasms by Site Prostatic Diseases Prostatic Neoplasms Urogenital Diseases Urogenital Neoplasms

Age range

18 year and older

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Calvary Mater Newcastle, Newcastle, New South Wales, Australia

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About this study

Most linear accelerators used to treat cancer patients today are equipped with fixed X-ray imagers which are typically used to take images of a tumour before a patient receives radiotherapy. A new technology, known as Kilovoltage Intrafraction Monitoring has recently emerged which allows images of a tumour to be taken in real-time while the treatment is occurring. The advantage of Kilovoltage Intrafraction Monitoring is that it enables strategies such as patient shifting or beam shifting during treatment which could potentially improve the accuracy of the treatment and reduce the patient's side effects. In addition, due to the accuracy of Kilovoltage Intrafraction Monitoring in targeting tumours, the number of treatment sessions this group of patients will require will be reduced to five as opposed to the 40 sessions required using more conventional treatment methods.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Histologically proven prostate adenocarcinoma
  • Low or intermediate risk disease as defined by:
  • Low Risk: All of PSA<10 ng/mL, Gleason Grade 6 AND Stage T1 or T2a
  • Intermediate Risk: Any or all of PSA 10-20 ng/mL, Gleason Grade 7 OR Stage T2b-c
  • Absence of high risk features (PSA>20, T3-4, N1 or M1 disease, Gleason score 8-10) (PSA must be within 3 months prior to enrolment)
  • ECOG Performance status 0-2
  • Suitable for definitive external beam radiotherapy (IMRT or VMAT)
  • Ability to have three gold fiducial markers placed in the prostate
  • Six month course of androgen deprivation therapy allowed at clinician discretion.
  • Available for follow up for a minimum of 2 years (up to 3 years)

Exclusion criteria

  • Lymph node irradiation
  • Any other systemic anti-prostate cancer therapy (i.e. non-ADT) both proven in the metastatic setting and investigational (e.g. docetaxel, enzalutamide)
  • Artificial hip(s) (Unable to visualise markers through prosthesis)
  • Prostate volume > 90 cm3 measured from the CT scan
  • Patient lateral dimension >40cm as measured at the level of the prostate from the CT scan
  • Suboptimal fiducial markers placement for treatment utilising KIM as assessed by a medical physicist by measuring marker positions from the CT scan
  • Fiducial migration or fewer than 3 fiducials present in the CT scan

Treatment and study plan

Multi-fraction SABR

Radiation

All participants will receive Multi-Fraction SABR; 36.25 Gy (PTV D95) in 5 Fractions within 2-5 weeks

Primary outcomes

  1. Accumulated patient dose distributions will be determined via paired controls by comparing the measured treatment accuracy and dose with KIM and those that would have been delivered in the absence of KIM

    Time frame: up to 36 months

Secondary outcomes

  1. Patient treatment outcomes determined by assessing Biochemical-clinical failure (BCF)

    Time frame: up to a maximum of 36 months.

  2. Patient treatment outcomes determined by assessing acute and late toxicity grade 3 or higher (using CTCAE version 4)

    Time frame: Weekly during treatment, then two weeks, six weeks and 6 months post treatment

  3. Patient treatment outcomes determined by assessing patient-reported outcomes

    Time frame: 12 and 24 months after treatment

  4. The patient's perception of KIM will be quantified using an adapted SAT-RAR survey, an instrument that has previously been used to assess patient perceptions on technological innovations in radiotherapy and respiratory gating.

    Time frame: up to 36 months

  5. Targeting accuracy through measuring the final geometric accuracy with and without the KIM gating procedure

    Time frame: up to 36 months

  6. Radiation therapists feedback on KIM will be quantified using a survey which will obtain specific information about the impact of the KIM system and SPARK on education, patient workflow, clinical impact and user confidence

    Time frame: up to 36 months

Sponsors and collaborators

Lead sponsor

University of Sydney

Other

Collaborators

  • Trans Tasman Radiation Oncology Group

Registry information

Official study title

Stereotactic Prostate Adaptive Radiotherapy Utilising Kilovoltage Intrafraction

Acronym: SPARK

Important dates

Study start
2016
Primary completion
2020
Study completion
2020
First posted
Mar 24, 2015
Registry last updated
May 19, 2026

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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