mri of the prostate - radreference.inforadreference.info/ewexternalfiles/prostatemri.pdf ·...
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PI-RAD v2 Assessment CategoriesPI-RADS 1 – Very low (clinically significant cancer is highly unlikely to be present)
PI-RADS 2 – Low (clinically significant cancer is unlikely to be present)
PI-RADS 3 – Intermediate (the presence of clinically significant cancer is equivocal)
PI-RADS 4 – High (clinically significant cancer is likely present)
PI-RADS 5 – Very high (clinically significant cancer is highly likely to be present)
MRI OF THE PROSTATE
Scoring
Scoring
Extra-Prostatic Extension
• Asymmetry, thickening, or irregularity of the neurovascular bundles
• Bulge of the prostatic capsule• Irregular or spiculated margins• Obliteration of the rectoprostatic
angle• Tumor-capsule interface >1 cm• Capsular breach with measurable
extraprostatic disease• Bladder wall invasion
Seminal Vesicle Invasion
• Focal or diffuse T2 hypointensity within the seminal vesicle
• Loss of the normal angle between the base of the prostate and the seminal vesicle
• Direct tumor extension into and surrounding the seminal vesicle
False Positives● Benign Prostatic
Hyperplasia (BPH)
● Hemorrhage
● Cysts
● Calcification
● Prostatitis
● Atrophy
● Fibrosis