MR imaging in primary irradiated prostatic carcinoma

english

1997

volume 31, issue 2

Onkološki inštitut Ljubljana

The main objective of our investigation was to determine the role of endorectal surface coil magnetic resonance (Endo-MR) in the monitoring of patients with prostate cancer before and after external beam radiation (EBR). A prospective study was performed on 26 patients with biopsy proven prostate cancer. All patients underwent Endo-MR prior to external beam radiation (pre-EBR). Six months after EBR (70Gy/1.8-2 Gy), another Endo-MR examination was performed until now in 14 patients (post-EBR). We used a 1.5 Tesla unit performing T1 and T2 weighted spin echo or fast spin echo sequences in axial and coronal planes. Imaging analysis included the assessment of tumor size, prostate capsule involvement and infiltration of the seminal vesicles. On all pre-EBR scans, we could identify a low intensity region in the peripheral zoneon T2 weighted images corespondng to the positive biopsy findings (11 cases with tumor confined prostate, 15 induced changes. In this presentation, the results are detailed and images from the study demonstrated. Endo-MR examination enables excellent morphological evaluation of prostate cancers andshows initial promise in demonstration of post radiation changes.

10.11.2023