Table 1 PI-RADS version 2 interpretation rules for mpMRI to detect csPCa
Peripheral zone | PI-RADS category | Transition zone | ||
|---|---|---|---|---|
Finding appearance on DWI | DCE | DWI | Finding appearance on T2WI | |
Score 1: no abnormalities on ADC and high b value DWI | – | 1 | – | Score 1: Uniform hyperintense signal intensity |
Score 2: indistinct hypointensity on ADC | – | 2 | – | Score 2: Linear or wedge-shaped hypointensity or diffuse mild hypointensity |
Score 3: focal hypointensity on ADC and isointensity on high b value DWI | No focal and early enhancement | 3 | If DWI score ≤ 4 | Score 3: Heterogeneous signal intensity or non-circumscribed, rounded, moderate hypointensity |
Focal and early enhancement | 4 | If DWI score = 5 | ||
Score 4: focal markedly hypointensity on ADC and markedly hyperintensity on high b value DWI | – | 4 | – | Score 4: Circumscribed, homogenous moderate hypointense focus/mass confined to prostate, and < 1.5 cm in greatest dimension |
Score 5: same as 4 but ≥ 1.5 cm in greatest dimension or definite extraprostatic extension/invasive behaviour | – | 5 | – | Score 5: Same as 4 but ≥ 1.5 cm in greatest dimension or definite extraprostatic extension/invasive behaviour |