CT-assisted assessment of bladder and rectum dose in gynecological implants. Academic Article uri icon

Overview

abstract

  • Eight patients who received gynecological implants with Fletcher-Suit type applicators were involved in this study. An orthogonal pair of films and computed tomographic scans were obtained for each patient. In the CT study, judicious use of contrast materials and selective window and level settings permitted clear delineation of the bladder and the rectum boundaries relative to the implanted applicators. In comparison to reference organ doses derived from the orthogonal film pair method, the maximum organ doses estimated from the CT-assisted evaluation were considerably higher, by approximately twofold on the average. The differences between the values estimated from the two methods vary from patient to patient, being highly dependent on the individual anatomy and the geometry of the implanted sources. These preliminary results point to the inaccuracy of the conventional method of estimating organ doses. CT-assisted evaluation may be necessary to accurately calculate organ doses in gynecological applications.

publication date

  • October 1, 1987

Research

keywords

  • Brachytherapy
  • Radiation Protection
  • Rectum
  • Tomography, X-Ray Computed
  • Urinary Bladder
  • Uterine Cervical Neoplasms

Identity

Scopus Document Identifier

  • 0023637829

Digital Object Identifier (DOI)

  • 10.1016/0360-3016(87)90327-0

PubMed ID

  • 3624031

Additional Document Info

volume

  • 13

issue

  • 10