Trial Outcomes & Findings for PET/MR for Rectal Cancer Treatment Monitoring and Surveillance (NCT NCT04150705)
NCT ID: NCT04150705
Last Updated: 2023-02-14
Results Overview
-For patients imaged at multiple time points after enrollment, all available PET/MRIs will be included in the feasibility analysis. Patients able to remain on the scanner for the full duration of the planned data acquisition without any serious adverse events will be considered to have completed the PET/MRI rectal cancer protocol. Image quality will be assessed by the Principal Investigator on review at a dedicated workstation with specialized PET/MR software. A standardized Likert-based scoring scheme will be utilized to capture subjective assessments of image contrast (1 = worst; 5 = best), image resolution (1 = worst; 5 = best), and image artifact 'freeness' (1 = worst; 5 = best). Image sets scoring ≥ 3 in all three categories will be considered of acceptable quality.
TERMINATED
NA
14 participants
Up to 12 months after completion of enrollment of all patients (26 months)
2023-02-14
Participant Flow
Participant milestones
| Measure |
FDG PET/MRI
-Patients will undergo FDG-PET/MRI in lieu of the standard pelvic MRI at up to 6 time-points at which it would normally be performed in their care for the period of time extending 30-36 months from the time of enrollment (depending on enrollment point). In the surveillance period, when patients typically undergo pelvic MRI every 3 months, the FDG-PET/MRI will be done in lieu of the standard pelvic MRI on an approximately every-other-scan basis. In other words, the FDG-PET/MRI will occur roughly once every 6 months.
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|---|---|
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Overall Study
STARTED
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14
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Overall Study
COMPLETED
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14
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Overall Study
NOT COMPLETED
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0
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Reasons for withdrawal
Withdrawal data not reported
Baseline Characteristics
PET/MR for Rectal Cancer Treatment Monitoring and Surveillance
Baseline characteristics by cohort
| Measure |
FDG PET/MRI
n=14 Participants
-Patients will undergo FDG-PET/MRI in lieu of the standard pelvic MRI at up to 6 time-points at which it would normally be performed in their care for the period of time extending 30-36 months from the time of enrollment (depending on enrollment point). In the surveillance period, when patients typically undergo pelvic MRI every 3 months, the FDG-PET/MRI will be done in lieu of the standard pelvic MRI on an approximately every-other-scan basis. In other words, the FDG-PET/MRI will occur roughly once every 6 months.
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|---|---|
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Age, Continuous
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51.6 years
n=5 Participants
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Sex: Female, Male
Female
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7 Participants
n=5 Participants
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Sex: Female, Male
Male
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7 Participants
n=5 Participants
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Ethnicity (NIH/OMB)
Hispanic or Latino
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0 Participants
n=5 Participants
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Ethnicity (NIH/OMB)
Not Hispanic or Latino
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14 Participants
n=5 Participants
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Ethnicity (NIH/OMB)
Unknown or Not Reported
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0 Participants
n=5 Participants
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Race (NIH/OMB)
American Indian or Alaska Native
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0 Participants
n=5 Participants
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Race (NIH/OMB)
Asian
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1 Participants
n=5 Participants
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Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
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0 Participants
n=5 Participants
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Race (NIH/OMB)
Black or African American
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0 Participants
n=5 Participants
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Race (NIH/OMB)
White
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13 Participants
n=5 Participants
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Race (NIH/OMB)
More than one race
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0 Participants
n=5 Participants
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Race (NIH/OMB)
Unknown or Not Reported
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0 Participants
n=5 Participants
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Region of Enrollment
United States
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14 participants
n=5 Participants
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PRIMARY outcome
Timeframe: Up to 12 months after completion of enrollment of all patients (26 months)-For patients imaged at multiple time points after enrollment, all available PET/MRIs will be included in the feasibility analysis. Patients able to remain on the scanner for the full duration of the planned data acquisition without any serious adverse events will be considered to have completed the PET/MRI rectal cancer protocol. Image quality will be assessed by the Principal Investigator on review at a dedicated workstation with specialized PET/MR software. A standardized Likert-based scoring scheme will be utilized to capture subjective assessments of image contrast (1 = worst; 5 = best), image resolution (1 = worst; 5 = best), and image artifact 'freeness' (1 = worst; 5 = best). Image sets scoring ≥ 3 in all three categories will be considered of acceptable quality.
Outcome measures
| Measure |
FDG PET/MRI
n=23 PET/MRI scans
-Patients will undergo FDG-PET/MRI in lieu of the standard pelvic MRI at up to 6 time-points at which it would normally be performed in their care for the period of time extending 30-36 months from the time of enrollment (depending on enrollment point). In the surveillance period, when patients typically undergo pelvic MRI every 3 months, the FDG-PET/MRI will be done in lieu of the standard pelvic MRI on an approximately every-other-scan basis. In other words, the FDG-PET/MRI will occur roughly once every 6 months.
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|---|---|
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Technical Feasibility of PET/MRI as Measured by the Completion of the Study With Acceptable Image Quality in ≥70% of Scans
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95.65 percentage of scans that were acceptable
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SECONDARY outcome
Timeframe: Up to 12 months after completion of enrollment of all patients (26 months)Population: 7 participants were evaluable for this outcome measure as they were deemed to not be immediate surgical candidates and went on to receive total neoadjuvant therapy (TNT).
* The study reader will interpret the MRI for the tumor regression grade and then will interpret the PET/MRI for the tumor regression grade. * The tumor regression grade is a five-tier imaging-based scoring system based on the ability to distinguish between tumor and fibrosis. mrTRG 1, low signal fibrosis only, no tumor signal; mrTRG 2, more than 75 per cent fibrosis and minimal tumor signal intensity; mrTRG 3, 50 per cent tumor/fibrosis; mrTRG 4, less than 25 per cent fibrosis, predominant tumor signal; and mrTRG 5, no fibrosis
Outcome measures
| Measure |
FDG PET/MRI
n=11 PET/MRI scans
-Patients will undergo FDG-PET/MRI in lieu of the standard pelvic MRI at up to 6 time-points at which it would normally be performed in their care for the period of time extending 30-36 months from the time of enrollment (depending on enrollment point). In the surveillance period, when patients typically undergo pelvic MRI every 3 months, the FDG-PET/MRI will be done in lieu of the standard pelvic MRI on an approximately every-other-scan basis. In other words, the FDG-PET/MRI will occur roughly once every 6 months.
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Percentage of Scans With Changes in Perceived Disease Status as Measured by PET/MRI Tumor Regression Grade Relative to the Conventional MRI Only Tumor Regression Grade
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18.18 percentage of scans
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Adverse Events
FDG PET/MRI
Serious adverse events
Adverse event data not reported
Other adverse events
| Measure |
FDG PET/MRI
n=14 participants at risk
-Patients will undergo FDG-PET/MRI in lieu of the standard pelvic MRI at up to 6 time-points at which it would normally be performed in their care for the period of time extending 30-36 months from the time of enrollment (depending on enrollment point). In the surveillance period, when patients typically undergo pelvic MRI every 3 months, the FDG-PET/MRI will be done in lieu of the standard pelvic MRI on an approximately every-other-scan basis. In other words, the FDG-PET/MRI will occur roughly once every 6 months.
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Gastrointestinal disorders
Nausea
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14.3%
2/14 • Adverse events were collected for a period of 24 hours following the administration of the radiotracer FDG.
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Additional Information
Tyler Fraum, M.D.
Washington University School of Medicine
Results disclosure agreements
- Principal investigator is a sponsor employee
- Publication restrictions are in place