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

Sale, C, Moloney, P and Mathlum, M 2013, 'Carcinoma of the anal canal: intensity modulated radiation therapy (IMRT) versus three-dimensional conformal radiation therapy (3DCRT)', Journal of Medical Radiation Sciences, vol. 60, pp. 145-155.


Document type: Journal Article
Collection: Journal Articles

Title Carcinoma of the anal canal: intensity modulated radiation therapy (IMRT) versus three-dimensional conformal radiation therapy (3DCRT)
Author(s) Sale, C
Moloney, P
Mathlum, M
Year 2013
Journal name Journal of Medical Radiation Sciences
Volume number 60
Start page 145
End page 155
Total pages 11
Publisher John Wiley & Sons
Abstract Introduction: 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. Methods: 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. Results: 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. Conclusion: The IMRT plans were superior to the conformal plans with improved dose conformity and 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.
Subject Radiation Therapy
Keyword(s) Anal carcinoma
IMRT
three-dimensionalconformal radiation therapy
DOI - identifier 10.1002/jmrs.28
Copyright notice © 2013 The Authors
ISSN 2051-3909
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