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Title: Carcinoma of the anal canal: Intensity modulated radiation therapy (IMRT) versus three-dimensional conformal radiation therapy (3DCRT)

Patients with anal canal carcinoma treated with standard conformal radiotherapy frequently experience severe acute and late toxicity reactions to the treatment area. Roohipour et al. (Dis Colon Rectum 2008; 51: 147–53) stated a patient's tolerance of chemoradiation to be an important prediction of treatment success. A new intensity modulated radiation therapy (IMRT) technique for anal carcinoma cases has been developed at the Andrew Love Cancer Centre aimed at reducing radiation to surrounding healthy tissue. A same-subject repeated measures design was used for this study, where five anal carcinoma cases at the Andrew Love Cancer Centre were selected. Conformal and IMRT plans were generated and dosimetric evaluations were performed. Each plan was prescribed a total of 54 Gray (Gy) over a course of 30 fractions to the primary site. The IMRT plans resulted in improved dosimetry to the planning target volume (PTV) and reduction in radiation to the critical structures (bladder, external genitalia and femoral heads). Statistically there was no difference between the IMRT and conformal plans in the dose to the small and large bowel; however, the bowel IMRT dose–volume histogram (DVH) doses were consistently lower. The IMRT plans were superior to the conformal plans with improved dose conformity andmore » reduced radiation to the surrounding healthy tissue. Anecdotally it was found that patients tolerated the IMRT treatment better than the three-dimensional (3D) conformal radiation therapy. This study describes and compares the planning techniques.« less
Authors:
; ;  [1]
  1. Andrew Love Cancer Centre, Geelong Hospital, Geelong, Victoria (Australia)
Publication Date:
OSTI Identifier:
22402335
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Medical Radiation Sciences (Print); Journal Volume: 60; Journal Issue: 4; Other Information: PMCID: PMC4175819; PMID: 26229623; OAI: oai:pubmedcentral.nih.gov:4175819; Copyright (c) 2013 The Authors. Journal of Medical Radiation Sciences published by Wiley Publishing Asia Pty Ltd on behalf of Australian Institute of Radiography and New Zealand Institute of Medical Radiation Technology; This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
Australia
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; BLADDER; CARCINOMAS; DOSES; DOSIMETRY; FORECASTING; HEAD; PATIENTS; PLANNING; RADIATION DOSE UNITS; RADIOTHERAPY; RECTUM; SI UNITS; TOLERANCE; TOXICITY