Superior detection of significant prostate cancer by MRI-transrectal ultrasound fusion image-guided biopsy using the BioJet system over transperineal MRI-targeted cognitive biopsy

Abstract

Background The BioJet system allows the fusion of magnetic resonance imaging (MRI) images with real-time transrectal ultrasonography to accurately direct biopsy needles to the target lesions. To date, the superiority of targeted biopsy using the BioJet system over cognitive registration remains unknown. Methods This retrospective study included 171 biopsy-naïve men with elevated prostate-specific antigen (2.5–20 ng/mL) and MRI-positive lesions; 74 and 97 men underwent a four-core targeted biopsy per MRI-positive target lesion and a 14-core systematic biopsy transperineally using the BioJet system and cognitive registration, respectively. Detection rates of significant cancer, defined as grade group ≥ 2 or maximum cancer length ≥ 5 mm, were compared between the BioJet system and cognitive registration using propensity score matching and a multivariate logistic regression model. Results After propensity score matching (70 men for each group), the detection rates of significant cancer were significantly higher in the BioJet group than in the cognitive group for both targeted (76% vs. 51%, P = 0.007) and systematic (70% vs. 46%, P = 0.005) biopsy. Multivariate analysis of the entire cohort also showed that the BioJet system was independently associated with significant cancer detection by targeted and systematic biopsy (P < 0.01), along with a higher prostate-specific antigen level, a lower prostate volume, and a higher prostate imaging reporting and data system score. Conclusions Transperineal prostate biopsy using the BioJet system is superior to cognitive registration in detecting significant cancer for targeted and systematic biopsies.