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POSLUMA PET Imaging for PI-RADS 3 Prostate Lesions (PRISM)

29 de octubre de 2026 actualizado por: SimonMed Imaging

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.

Descripción general del estudio

Descripción detallada

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.

Tipo de estudio

Intervencionista

Inscripción (Estimado)

130

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

Ubicaciones de estudio

    • Arizona
      • Avondale, Arizona, Estados Unidos, 85392
        • SimonMed Imaging - Akos
        • Contacto:
      • Chandler, Arizona, Estados Unidos, 85224
        • SimonMed Imaging - Chandler South
        • Contacto:
      • Mesa, Arizona, Estados Unidos, 85206
        • SimonMed Imaging - Greenfield
        • Contacto:
      • Phoenix, Arizona, Estados Unidos, 85004
        • SimonMed Imaging - Central Phoenix
        • Contacto:
      • Scottsdale, Arizona, Estados Unidos, 85254
        • SimonMed Imaging - Kierland
        • Contacto:
      • Surprise, Arizona, Estados Unidos, 85374
        • SimonMed Imaging - Surprise Stadium Village
        • Contacto:

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años y mayores (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Masculino

Descripción

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 de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Diagnóstico
  • Asignación: N / A
  • Modelo Intervencionista: Asignación de un solo grupo
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
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.

Otros nombres:
  • 18F-rhPSMA-7.3
  • POSLUMA

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Diagnostic accuracy of POSLUMA PET for clinically significant prostate cancer
Periodo de tiempo: 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

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Sensitivity of POSLUMA PET
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Colaboradores

Investigadores

  • Investigador principal: Howard John Simon, MD, SimonMed Imaging

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Estimado)

1 de diciembre de 2026

Finalización primaria (Estimado)

1 de diciembre de 2028

Finalización del estudio (Estimado)

1 de diciembre de 2028

Fechas de registro del estudio

Enviado por primera vez

29 de octubre de 2026

Primero enviado que cumplió con los criterios de control de calidad

29 de octubre de 2026

Publicado por primera vez (Actual)

4 de noviembre de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

4 de noviembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

29 de octubre de 2026

Última verificación

1 de octubre de 2026

Más información

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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