Radiotherapeutic Applications of Pelvic Computed Tomography

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Abstract
Computed tomography (CT) examinations [104] were performed on 72 consecutive radiotherapy patients with pelvic malignancies. Prostate, bladder, rectosigmoid, gynecologic and lymphomatous primaries were studied. CT demonstrated tumor volumes larger than clinically expected in 40% and tumor extension into unsuspected tissues in 43%. Based on CT, staging was revised upward in 25%. CT aided initial treatment planning in 61%. In 27 patients having post-therapy scans, changes in tumor volume were demonstrated in 59%. Modifications in therapy were made for 30% of the follow-up group. Computed tomography is recommended as an important adjunct in the workup and management of radiotherapy patients with pelvic malignancies.