Prostate Imaging Reporting and Data System
Assesses the likelihood of clinically significant prostate cancer using multiparametric MRI. PI-RADS 1-5 categories are determined by T2W, DWI/ADC, and DCE findings. Different criteria apply to peripheral zone (PZ) and transition zone (TZ).
Clinically significant cancer is highly unlikely
Management: MR-guided biopsy not needed
Clinically significant cancer is unlikely
Management: MR-guided biopsy not needed
Presence of clinically significant cancer is equivocal
Management: Clinical correlation; biopsy if PSA density >0.15
Clinically significant cancer is likely
Management: MR-guided or systematic biopsy
Clinically significant cancer is highly likely
Management: Biopsy (MR-guided preferred)
This classification system is intended for clinical decision support. Final diagnosis and treatment decisions rest with the clinician.