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OpenTrials
Completed

NCT Number: NCT06224543

MR Image Synthesis With Low Gadobutrol Dose and AI

Study 22403 is a Phase 1 / Proof of Concept exploratory investigation to assess the non-inferiority of low dose gadobutrol and SubtleGAD™, a software medical device using an Artificial Intelligence (AI) deep learning-based method to enhance the contrast signal from images acquired with low dose administration of gadobutrol (GAD) contrast. The primary objective is to demonstrate noninferiority of synthesized Central Nervous System (CNS) magnetic resonance (MR) images for 1 or 2 different gadobutrol-enhanced low-dose groups (0.01mmol/kg, and0.025 mmol/kg) compared to gadobutrol-enhanced CNS MR images at a standard dose of 0.1 mmol/kg. This investigation is a prospective, randomized, open label, multi-center study with blinded reads in participants with known or highly suspected CNS pathology. There will be at least 60 participants enrolled (30 per study arm). SubtleGAD will be used as a post-processing tool, prior to blinded read assessment of MR images acquired in either arm of the study.

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Key information

Age range

18 year–89 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Primary location

Central Illinois Radiological Associates; OSF St. Francis Hospital Peoria, Peoria, Illinois, United States

Loading trial locations.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • At the time of signing the informed consent at least 18 years of age and less than or equal to 89 years of age.
  • Have known or highly suspected brain lesions referred for contrast-enhanced MRI of the CNS.
  • Have an estimated glomerular filtration rate (eGFR) value ≥ 60 mL/min/1.73m^2.
  • Be fully informed about the study, including provisions of the Health Insurance Portability and Accountability Act (HIPAA) as applicable, and being capable and willing to consent to participate.

Exclusion criteria

  • Considered clinically unstable or has a concomitant/intercurrent condition that would not allow participation in the study.
  • Diagnoses of multiple sclerosis or other disease process that is expected to change its enhancement pattern in the time period of the follow-up.
  • Brain pathology or abnormalities that are not considered lesions.
  • Any contraindication for MRI procedure or gadobutrol administration.
  • Has severe cardiovascular disease.
  • Is expected or is scheduled to have a change in any treatment or procedure between the two study periods that may alter image comparability.
  • Is scheduled or is likely to require a biopsy or any interventional therapeutic procedure from the first study MRI up to 24 hours after the second study MRI.
  • Women currently lactating, pregnant, or planning on becoming pregnant during the study.
  • Women of childbearing potential with a positive urine pregnancy test within 24 hours before either gadobutrol administration.
  • Receipt of any gadolinium-based contrast agent <72 hours prior to the study MRIs.
  • Participants with acute kidney injury.

Treatment and study plan

SubtleGAD

Device

SubtleGAD is an image processing software developed to enhance MR images acquired with low dose gadobutrol.

Gadobutrol

Drug

Gadavist is indicated for use with magnetic resonance imaging (MRI) in adult and pediatric patients including term neonates to detect and visualize areas with disrupted blood brain barrier and/or abnormal vascularity of the central nervous system.

Other names: Gadavist Injection

Primary outcomes

  1. Compare enhancement of SubtleGAD in 10% dose and 25% dose gadobutrol MR images.

    Time frame: 4 to 15 days

    Compare enhancing lesions in gadobutrol-enhanced central nervous system (CNS) magnetic resonance imaging (MRI) low dose groups (0.01 mmol/kg, 0.025 mmol/kg), and standard dose (0.1 mmol/kg).

Sponsors and collaborators

Lead sponsor

Subtle Medical

Industry

Collaborators

  • Bayer

Registry information

Official study title

Evaluate Artificial Intelligence (AI) Synthesized MR Images From Low Dose Gadobutrol CNS Images vs Standard Dose Gadobutrol CNS Images

Important dates

Study start
2023
Primary completion
2025
Study completion
2025
First posted
Jan 25, 2024
Registry last updated
Sep 2, 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.