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.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
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.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Xiaowei Hong
- Telefonnummer: 702-433-6944
- E-mail: adeline.hong@simonmed.com
Studiesteder
-
-
Arizona
-
Avondale, Arizona, Forenede Stater, 85392
- SimonMed Imaging - Akos
-
Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Chandler, Arizona, Forenede Stater, 85224
- SimonMed Imaging - Chandler South
-
Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Mesa, Arizona, Forenede Stater, 85206
- SimonMed Imaging - Greenfield
-
Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Phoenix, Arizona, Forenede Stater, 85004
- SimonMed Imaging - Central Phoenix
-
Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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Scottsdale, Arizona, Forenede Stater, 85254
- SimonMed Imaging - Kierland
-
Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-mail: adeline.hong@simonmed.com
-
Surprise, Arizona, Forenede Stater, 85374
- SimonMed Imaging - Surprise Stadium Village
-
Kontakt:
- Xiaowei Hong
- Telefonnummer: 86+15821075453
- E-mail: adeline.hong@simonmed.com
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-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
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
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: 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.
Andre navne:
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Diagnostic accuracy of POSLUMA PET for clinically significant prostate cancer
Tidsramme: 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
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Sensitivity of POSLUMA PET
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
|
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Performance of a multivariable diagnostic model
Tidsramme: 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
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Samarbejdspartnere
Samarbejdspartnere
Efterforskere
Efterforskere
- Ledende efterforsker: Howard John Simon, MD, SimonMed Imaging
Datoer for undersøgelser
Studer store datoer
Studiestart (Anslået)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Urogenitale sygdomme
- Genitale sygdomme
- Genitale neoplasmer, mandlige
- Urogenitale neoplasmer
- Neoplasmer efter sted
- Neoplasmer
- Kønssygdomme, mandlige
- Prostatasygdomme
- Mandlige urogenitale sygdomme
- Prostatiske neoplasmer
- Diagnostiske teknikker og procedurer
- Diagnose
- Tomografi
- Diagnostisk billeddannelse
- Billedtolkning, computerassisteret
- Billedforbedring
- Fotografering
- Tomografi, emission-kompettet
- Radionuclide Imaging
- Diagnostiske teknikker, radioisotop
- Positron-emissionstomografi
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- TUNIRB000379
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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