for males ages 18-90 (full criteria)
study started
estimated completion
Principal Investigator
by Jeremie Calais (ucla)



This early phase I trial studies how well an image-guided prostate biopsy using the imaging agent 68Ga-prostate-specific membrane antigen (PSMA)-11 with a positron emission tomography/computed tomography (PET/CT) scan works in diagnosing prostate cancer in men with a prior negative or inconclusive prostate biopsy. PSMA is a protein that is found on the surface of prostate cancer cells. 68Ga-PSMA-11 is made up of a substance that binds to PSMA on tumor cells, linked with a radioactive substance that can then be seen on imaging scans such as PET/CT. 68Ga-PSMA-11 PET/CT-guided biopsy may help improve the detection rate of prostate cancer. This may help reduce over-diagnosis and over-treatment in men with low-risk prostate cancer and under-treatment in men with high-risk prostate cancer.

Official Title

Evaluation of 68Ga-PSMA-11 PET Guided Prostate Biopsy in Men With Suspicion of Clinically Significant Prostate Cancer and Prior Negative/Inconclusive Biopsy: A Prospective Exploratory Study


PRIMARY OBJECTIVE: I. To assess the detection rate of clinically significant prostate cancer (Gleason score 7 or more) in patients with focal gallium Ga 68 gozetotide (68Ga-PSMA-11) uptake within the prostate. OUTLINE: SCREENING PROCEDURE: Patients receive 68Ga-PSMA-11 intravenously (IV) and 50-100 minutes later, undergo a PET/CT scan. Only patients with 68Ga-PSMA-11 uptake within the prostate proceed to image-guided biopsy. IMAGE-GUIDED BIOPSY: Patients undergo experimental image-guided prostate biopsy using PET/CT images obtained during screening procedure during a standard of care transrectal ultrasonography guided biopsy (TRUS).


Prostate Carcinoma, Prostatic Neoplasms, Edetic Acid, Gallium 68 PSMA-11, Biopsy of Prostate, Gallium Ga 68 Gozetotide, Transrectal Ultrasonography Guided Biopsy


You can join if…

Open to males ages 18-90

  • Men with suspicion of clinically significant prostate cancer with prior inconclusive, discordant or negative magnetic resonance imaging/ultrasound (MRI/US) fusion prostate biopsy
  • Scheduled for a repeat transrectal ultrasound (TRUS) prostate biopsy by standard of care
  • Focal 68Ga-PSMA-11 uptake within the prostate

You CAN'T join if...

  • Negative 68Ga-PSMA-11 uptake within the prostate (screening failure)
  • Age < 18 and > 90 years
  • Recurrent prostate cancer
  • Inability to provide written informed consent
  • Known inability to remain still and lie flat for the duration of the PET/CT (about 30 minutes)


  • UCLA / Jonsson Comprehensive Cancer Center accepting new patients
    Los Angeles California 90095 United States

Lead Scientist at UC Cancer

  • Jeremie Calais (ucla)
    HS Associate Clinical Professor, Molecular and Medical Pharmacology, Medicine. Authored (or co-authored) 93 research publications


accepting new patients
Start Date
Completion Date
Jonsson Comprehensive Cancer Center
Phase 1 Prostate Cancer Research Study
Study Type
Expecting 30 study participants
Last Updated