Likert score and Prostate Imaging Reporting And Data System (PI - RADS score) to assess the likelihood of prostate cancer based on multiparametric MRI
Last edited 05/2019 and last reviewed 09/2022
Two scoring systems are commonly used to evaluate the likelihood of prostate cancer on multiparametric MRI:
- Prostate Imaging Reporting And Data System version 2 (PI-RADS_v2)
which uses explicit criteria based on a zonal multiparametric MRI (mpMRI)
dominant sequence (e.g. diffusion-weighted imaging in the peripheral zone
(PZ) and T2 weighted imaging in the transition zone) to rate the suspicion
of prostate cancer on a 5-point scale and
- a subjective 5-point Likert assessment, based on each mpMRI sequence equally (unlike the use of dominant sequence in PIRADS_v2) and adapted to the radiologist's experience for overall impression
Both 5-point scales define the likelihood for the presence of prostate cancer, as follows
- (1) highly unlikely,
- (2) unlikely,
- (3) equivocal,
- (4) likely,
- (5) highly likely
Reference:
- Renard-Penna R et al. Prostate imaging reporting and data system and Likert scoring system: multiparametric MR imaging validation study to screen patients for initial biopsy. Radiology 2015; 275: 458-68.
- Rosenkrantz AB et al. Comparison of interreader reproducibility of the prostate imaging reporting and data system and likert scales for evaluation of multiparametric prostate MRI. AJR Am J Roentgenol 2013; 201: W612-W618.