POSLUMA PET Imaging for PI-RADS 3 Prostate Lesions (PRISM)
Targeting the Gray Zone: Early Detection of Clinically Significant Prostate Cancer in PI-RADS 3 Patients Using PET Imaging With an 18F-Labeled Radiohybrid PSMA-Targeted Imaging Agent
This prospective, multicenter diagnostic accuracy study will evaluate whether POSLUMA (flotufolastat F 18) PET/MRI or PET/CT can detect clinically significant prostate cancer, defined as Gleason score 7 or higher, in adult men with PI-RADS 3 lesions on recent multiparametric MRI and a clinical indication for prostate biopsy. Participants will undergo a research-only POSLUMA PET scan before targeted and systematic prostate biopsy. PET imaging metrics and clinical variables will be compared with histopathology. Research PET results will not be used to guide clinical management or replace standard diagnostic procedures.
연구 개요
상태
상태
정황
정황
개입 / 치료
개입 / 치료
상세 설명
Men aged 18 years or older with a PI-RADS 3 lesion identified on multiparametric MRI within the prior 4 weeks and a clinical indication for prostate biopsy will be consecutively enrolled. After written informed consent, participants will undergo POSLUMA PET/MRI or PET/CT. POSLUMA will be administered as an intravenous bolus at 296 MBq (8 mCi), and imaging will begin approximately 60 minutes after administration. PET-derived metrics, including SUVmax, PRIMARY score, lesion-to-background ratio, and lesion volume, will be recorded. MRI features and clinical parameters, including PSA, PSA density, and free-to-total PSA ratio, may also be collected.
The reference standard will be histopathology from targeted biopsy of the PI-RADS 3 lesion together with systematic prostate biopsy. Diagnostic performance will be evaluated using lesion-level area under the receiver operating characteristic curve, sensitivity, specificity, positive predictive value, and negative predictive value. The study will also estimate biopsy avoidance and missed clinically significant prostate cancer rates and explore multivariable models combining PET, MRI, and clinical variables. Participants should not expect direct clinical benefit, and the research PET result will not alter biopsy decisions or other standard care.
연구 유형
연구 유형
등록 (추정된)
등록
단계
단계
- 해당 없음
연락처 및 위치
연구 연락처
연구 연락처
- 이름: Xiaowei Hong
- 전화번호: 702-433-6944
- 이메일: adeline.hong@simonmed.com
연구 장소
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Arizona
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Avondale, Arizona, 미국, 85392
- SimonMed Imaging - Akos
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연락하다:
- Xiaowei Hong
- 전화번호: 86+15821075453
- 이메일: adeline.hong@simonmed.com
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Chandler, Arizona, 미국, 85224
- SimonMed Imaging - Chandler South
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연락하다:
- Xiaowei Hong
- 전화번호: 86+15821075453
- 이메일: adeline.hong@simonmed.com
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Mesa, Arizona, 미국, 85206
- SimonMed Imaging - Greenfield
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연락하다:
- Xiaowei Hong
- 전화번호: 86+15821075453
- 이메일: adeline.hong@simonmed.com
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Phoenix, Arizona, 미국, 85004
- SimonMed Imaging - Central Phoenix
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연락하다:
- Xiaowei Hong
- 전화번호: 86+15821075453
- 이메일: adeline.hong@simonmed.com
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Scottsdale, Arizona, 미국, 85254
- SimonMed Imaging - Kierland
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연락하다:
- Xiaowei Hong
- 전화번호: 86+15821075453
- 이메일: adeline.hong@simonmed.com
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Surprise, Arizona, 미국, 85374
- SimonMed Imaging - Surprise Stadium Village
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연락하다:
- Xiaowei Hong
- 전화번호: 86+15821075453
- 이메일: adeline.hong@simonmed.com
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참여기준
자격 기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
설명
Inclusion Criteria:
- Male, age 18 years or older
- PI-RADS 3 lesion diagnosed by multiparametric MRI within the past 4 weeks
- Clinical indication for prostate biopsy
- Undergoing targeted biopsy and systematic biopsy as part of the routine clinical pathway
- Able to provide written informed consent
Exclusion Criteria:
- Prior diagnosis or treatment of prostate cancer
- PI-RADS 4 or 5 lesion
- Negative MRI, defined as PI-RADS 1 or 2
- Contraindication to PSMA PET or prostate biopsy
- Contraindication to both MRI and CT
- Any medical condition that may interfere with study procedures
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 특수 증상
- 할당: 해당 없음
- 중재 모델: 단일 그룹 할당
- 마스킹: 없음(오픈 라벨)
팔의 수
무기와 개입
참가자 그룹 / 팔참가자 그룹 / 팔 |
개입 / 치료개입 / 치료 |
|---|---|
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실험적: POSLUMA PET Diagnostic Imaging
Participants undergo one research-only POSLUMA PET/MRI or PET/CT before targeted and systematic prostate biopsy. |
Participants undergo research-only PSMA PET/MRI or PET/CT using POSLUMA (flotufolastat F 18) before clinically indicated prostate biopsy. POSLUMA is administered intravenously at 296 MBq (8 mCi), with PET imaging beginning approximately 60 minutes after administration. PET imaging findings are compared with histopathology from targeted and systematic prostate biopsy.
다른 이름들:
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연구는 무엇을 측정합니까?
주요 결과 측정
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Diagnostic accuracy of POSLUMA PET for clinically significant prostate cancer
기간: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Lesion-level area under the receiver operating characteristic curve for POSLUMA PET metrics, including SUVmax and PRIMARY score, using biopsy histopathology and clinically significant prostate cancer defined as Gleason score 7 or higher as the reference standard. |
From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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2차 결과 측정
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Sensitivity of POSLUMA PET
기간: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Lesion-level sensitivity for detecting clinically significant prostate cancer using biopsy histopathology as the reference standard. |
From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Specificity of POSLUMA PET
기간: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Lesion-level specificity for detecting clinically significant prostate cancer using biopsy histopathology as the reference standard. |
From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Positive predictive value of POSLUMA PET
기간: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Positive predictive value for detecting clinically significant prostate cancer using biopsy histopathology as the reference standard. |
From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Negative predictive value of POSLUMA PET
기간: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Negative predictive value for detecting clinically significant prostate cancer using biopsy histopathology as the reference standard. |
From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
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Potential biopsy avoidance rate
기간: At completion of biopsy histopathology review, up to approximately 6 weeks after the PET scan
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Percentage of participants with low PSMA uptake who would be classified as potentially able to avoid biopsy under the study's exploratory imaging criteria. |
At completion of biopsy histopathology review, up to approximately 6 weeks after the PET scan
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Missed clinically significant prostate cancer rate
기간: At completion of biopsy histopathology review, up to approximately 6 weeks after the PET scan
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Proportion of clinically significant prostate cancer cases associated with low PSMA uptake under the study's exploratory imaging criteria. |
At completion of biopsy histopathology review, up to approximately 6 weeks after the PET scan
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Performance of a multivariable diagnostic model
기간: After completion of imaging, biopsy, and histopathology data collection, through December 2028
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Model performance when combining PSMA PET metrics with clinical and imaging variables such as PSA, PSA density, free-to-total PSA ratio, ADC, lesion volume, and other protocol-specified variables. |
After completion of imaging, biopsy, and histopathology data collection, through December 2028
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공동 작업자 및 조사자
협력자
협력자
수사관
수사관
- 수석 연구원: Howard John Simon, MD, SimonMed Imaging
연구 기록 날짜
연구 주요 날짜
연구 시작 (추정된)
연구 시작
기본 완료 (추정된)
기본 완료
연구 완료 (추정된)
연구 완료
연구 등록 날짜
최초 제출
최초 제출
QC 기준을 충족하는 최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
처음 게시됨
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
마지막 업데이트 게시됨
QC 기준을 충족하는 마지막 업데이트 제출
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
기타 연구 ID 번호
- TUNIRB000379
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
미국에서 제조되어 미국에서 수출되는 제품
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