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.
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
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.
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Xiaowei Hong
- Telefonnummer: 702-433-6944
- E-Mail: adeline.hong@simonmed.com
Studienorte
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Arizona
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Avondale, Arizona, Vereinigte Staaten, 85392
- SimonMed Imaging - Akos
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Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-Mail: adeline.hong@simonmed.com
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Chandler, Arizona, Vereinigte Staaten, 85224
- SimonMed Imaging - Chandler South
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Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-Mail: adeline.hong@simonmed.com
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Mesa, Arizona, Vereinigte Staaten, 85206
- SimonMed Imaging - Greenfield
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Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-Mail: adeline.hong@simonmed.com
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Phoenix, Arizona, Vereinigte Staaten, 85004
- SimonMed Imaging - Central Phoenix
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Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-Mail: adeline.hong@simonmed.com
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Scottsdale, Arizona, Vereinigte Staaten, 85254
- SimonMed Imaging - Kierland
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Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-Mail: adeline.hong@simonmed.com
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Surprise, Arizona, Vereinigte Staaten, 85374
- SimonMed Imaging - Surprise Stadium Village
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Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-Mail: adeline.hong@simonmed.com
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
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
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Diagnose
- Zuteilung: N / A
- Interventionsmodell: Einzelgruppenzuweisung
- Maskierung: Keine (Offenes Etikett)
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
|
Experimental: 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.
Andere Namen:
|
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Diagnostic accuracy of POSLUMA PET for clinically significant prostate cancer
Zeitfenster: 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
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Sensitivity of POSLUMA PET
Zeitfenster: 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
|
|
Specificity of POSLUMA PET
Zeitfenster: 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
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|
Positive predictive value of POSLUMA PET
Zeitfenster: 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
|
|
Negative predictive value of POSLUMA PET
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
|
Mitarbeiter und Ermittler
Sponsor
Sponsor
Mitarbeiter
Mitarbeiter
Ermittler
Ermittler
- Hauptermittler: Howard John Simon, MD, SimonMed Imaging
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Urogenitale Erkrankungen
- Genitalerkrankungen
- Genitale Neubildungen, männlich
- Urogenitale Neoplasmen
- Neubildungen nach Standort
- Neubildungen
- Genitalerkrankungen, männlich
- Prostataerkrankungen
- Männliche Urogenitalerkrankungen
- Prostataneoplasmen
- Diagnosetechniken und Verfahren
- Diagnose
- Tomographie
- Diagnostische Bildgebung
- Bildinterpretation, computergestützt
- Bildverbesserung
- Fotografie
- Tomographie, Emissionskomput
- Radionuklidbildgebung
- Diagnosetechniken, Radioisotop
- Positron-Emissionstomographie
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- TUNIRB000379
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
Produkt, das in den USA hergestellt und aus den USA exportiert wird
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