Accuracy of Prostate Magnetic Resonance Imaging: Reader Experience Matters

Area of Science:

• Radiology
• Oncology
• Medical Imaging

Background:

• Prostate magnetic resonance imaging (MRI) is crucial for prostate cancer detection, biopsy guidance, and active surveillance.
• The diagnostic accuracy of prostate MRI can be influenced by imaging techniques, patient demographics, and radiologist expertise.

Purpose of the Study:

• To evaluate the impact of radiologist experience on the accuracy of prostate MRI interpretation.
• To compare the diagnostic performance of abdominal radiologists (AR) versus specialized prostate MRI radiologists (PR).

Main Methods:

• Retrospective analysis of 194 prostate MRI scans with subsequent fusion biopsies.
• Regions of interest were rescored by blinded, experienced prostate MRI radiologists (PR group) over 14 months after initial interpretation by abdominal radiologists (AR group).
• Likert scoring was used, with scores of 4-5 considered MRI-positive for clinically significant prostate cancer (csPCa; Gleason grade group ≥2).

Main Results:

• The PR group demonstrated higher accuracy in identifying csPCa (64.9%) compared to the AR group (39.3%) for MRI-positive lesions.
• MRI-negative lesions scored by the PR group were more likely to be benign or low-grade (91.8%) versus the AR group (76.6%).
• The PR group showed significantly higher sensitivity (85.9% vs. 70.7%) and specificity (77.3% vs. 46.8%) for detecting csPCa.

Conclusions:

• Reader experience significantly impacts prostate MRI accuracy, with specialized radiologists achieving superior diagnostic performance.
• Prostate MRI interpretation by experienced radiologists leads to improved sensitivity, specificity, and overall diagnostic accuracy for csPCa.
• These findings underscore the importance of specialized training in prostate MRI interpretation for optimal cancer detection and patient care.