Safety and Diagnostic Performance of uPAR PET Imaging in Localised, Untreated Prostate Cancer

Inclusion Criteria: * Pathology-verified prostate adenocarcinoma * International Society of Urological Pathology (ISUP) grade 1 to 3 * Localised prostate cancer (N0 and M0 status) (only required for ISUP 3 patients) 1. Newly diagnosed patients: Staging must be performed within 6 months from enrolment into the trial. 2. Active surveillance: N0/M0 at the time of diagnosis and no clinical suspicion of prostate cancer outside the prostatic bed at the time of enrolment into the trial. * Eastern Cooperative Oncology Group (ECOG) performance status 0-2 * Prostate biopsy within 1 to 6 months (patients with a biopsy within the last month are excluded to avoid possible inflammation artefacts on the PET scan) 1. The biopsy can be part of the primary staging, a confirmatory biopsy, or serial biopsy as part of an AS. 2. At least 1 core must be MRI-guided. Exclusion Criteria: * Any prior treatment for prostate cancer (surgery, external beam radiation therapy, brachytherapy, hormone therapy, or chemotherapy) * Chronic prostatitis (any signs or symptoms of chronic bacterial prostatitis or chronic pelvic prostatitis and pain syndrome, or known diagnosis of asymptomatic inflammatory prostatitis) * Acute infections within the prostatic bed or lower urinary tract infections * Participants have inadequate bone marrow, kidney, liver, heart, or lung function: