Ga-68 PSMA-11 PET/CT in Patients With Biochemical Recurrence of Prostate Cancer: Digital PET/CT Versus Analog PET/CT

Ga-68 PSMA-11 PET/CT is known as useful method for localizing recurred tumor lesions in prostate cancer patients with biochemical recurrence \[elevated serum prostate specific antigen (PSA) after radical prostatectomy\]. The recent digital PET/CT which is known to show better resolution and sensitivity than analogue PET/CT may have better performance for detecting early small recurred tumor lesions. This study is intended to compare the diagnostic performance (detection rate and positive predictive value) of Ga-68 PSMA-11 PET/CT using analogue PET/CT scanner and digital PET/CT scanner in same patients who had biochemical recurrence of prostate cancer.