- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT07916311
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.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
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.
Type d'étude
Inscription (Estimé)
Phase
- N'est pas applicable
Contacts et emplacements
Coordonnées de l'étude
- Nom: Xiaowei Hong
- Numéro de téléphone: 702-433-6944
- E-mail: adeline.hong@simonmed.com
Lieux d'étude
-
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Arizona
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Avondale, Arizona, États-Unis, 85392
- SimonMed Imaging - Akos
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Contact:
- Xiaowei Hong
- Numéro de téléphone: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Chandler, Arizona, États-Unis, 85224
- SimonMed Imaging - Chandler South
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Contact:
- Xiaowei Hong
- Numéro de téléphone: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Mesa, Arizona, États-Unis, 85206
- SimonMed Imaging - Greenfield
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Contact:
- Xiaowei Hong
- Numéro de téléphone: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Phoenix, Arizona, États-Unis, 85004
- SimonMed Imaging - Central Phoenix
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Contact:
- Xiaowei Hong
- Numéro de téléphone: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Scottsdale, Arizona, États-Unis, 85254
- SimonMed Imaging - Kierland
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Contact:
- Xiaowei Hong
- Numéro de téléphone: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Surprise, Arizona, États-Unis, 85374
- SimonMed Imaging - Surprise Stadium Village
-
Contact:
- Xiaowei Hong
- Numéro de téléphone: 86+15821075453
- E-mail: adeline.hong@simonmed.com
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
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
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Diagnostique
- Répartition: N / A
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Expérimental: 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.
Autres noms:
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Diagnostic accuracy of POSLUMA PET for clinically significant prostate cancer
Délai: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
|
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
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Sensitivity of POSLUMA PET
Délai: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
|
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
|
|
Specificity of POSLUMA PET
Délai: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
|
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
|
|
Positive predictive value of POSLUMA PET
Délai: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
|
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
|
|
Negative predictive value of POSLUMA PET
Délai: From research PET imaging through histopathology review, up to approximately 6 weeks after the PET scan
|
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
|
|
Potential biopsy avoidance rate
Délai: At completion of biopsy histopathology review, up to approximately 6 weeks after the PET scan
|
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
|
|
Missed clinically significant prostate cancer rate
Délai: At completion of biopsy histopathology review, up to approximately 6 weeks after the PET scan
|
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
|
|
Performance of a multivariable diagnostic model
Délai: After completion of imaging, biopsy, and histopathology data collection, through December 2028
|
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
|
Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Howard John Simon, MD, SimonMed Imaging
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
- Maladies urogénitales
- Maladies génitales
- Tumeurs génitales, homme
- Tumeurs urogénitales
- Tumeurs par site
- Tumeurs
- Maladies génitales, sexe masculin
- Maladies de la prostate
- Maladies urogénitales masculines
- Tumeurs prostatiques
- Techniques et procédures de diagnostic
- Diagnostic
- Tomographie
- Imagerie diagnostique
- Interprétation d'image, assistée par ordinateur
- Amélioration de l'image
- Photographie
- Tomographie, émission composée
- Imagerie par radionucléide
- Techniques de diagnostic, radio-isotope
- Tomographie par émission de positrons
Autres numéros d'identification d'étude
- TUNIRB000379
Informations sur les médicaments et les dispositifs, documents d'étude
Étudie un produit pharmaceutique réglementé par la FDA américaine
Étudie un produit d'appareil réglementé par la FDA américaine
produit fabriqué et exporté des États-Unis.
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