Prostatic disorders: MR imaging at 1.5 T.
Journal Article (Journal Article)
Pelvic magnetic resonance (MR) images obtained at 1.5 T of 31 men with known genitourinary disease were reviewed retrospectively. In most, peripheral and central prostatic zones could be seen on axial images obtained with long repetition times/echo times (TRs/TEs). The prostate had no specific signal intensity that enabled differentiation between benign and malignant changes. Each patient with known extracapsular prostatic carcinoma had a peripheral zone defect--1 cm or greater in diameter with ill-defined borders and relatively lower signal intensity than that of the remainder of the peripheral zone--that correlated with the site of clinical-pathologic involvement. Correlation of a peripheral zone defect on long TR/TE images as a sign for extracapsular spread of prostatic cancer was 100% sensitive, yet 54% specific, with excellent interobserver agreement. Stage A2 and B1 prostatic carcinoma was not detected. Benign prostatic hyperplasia was seen as centrally located proliferation and nodularity, usually with discrete margins and a wide spectrum of low- to high-signal-intensity features. MR imaging may have a role in differentiating between intracapsular and extracapsular prostatic carcinoma.
- Phillips, ME; Kressel, HY; Spritzer, CE; Arger, PH; Wein, AJ; Marinelli, D; Axel, L; Gefter, WB; Pollack, HM
- August 1987
Volume / Issue
- 164 / 2
Start / End Page
- 386 - 392
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)
- United States