Comparison of three concomitant boost techniques for early-stage breast cancer.

Published

Journal Article

PURPOSE: Whole breast radiotherapy (RT) followed by a tumor bed boost typically spans 5-6 weeks of treatment. Interest is growing in RT regimens, such as concomitant boost, that decrease overall treatment time, lessening the time/cost burden to patients and facilities. METHODS AND MATERIALS: Computed tomography (CT) scans from 20 cases were selected for this retrospective, dosimetric study to compare three different techniques of concomitant boost delivery: (1) standard tangents plus an electron boost, (2) intensity-modulated RT (IMRT) tangents using custom compensators plus an electron boost, and (3) IMRT tangents plus a conformal photon boost. The equivalent uniform dose model was used to compare the plans. RESULTS: The average breast equivalent uniform dose value for the three techniques (standard, IMRT plus electrons, and IMRT plus photons) was 48.6, 47.9, and 48.3, respectively. The plans using IMRT more closely approximated the prescribed dose of 46 Gy to the whole breast. The breast volume receiving >110% of the dose was less with the IMRT tangents than with standard RT (p = 0.037), but no significant difference in the maximal dose or other evaluated parameters was noted. CONCLUSION: Although the IMRT techniques delivered the prescribed dose with better dose uniformity, the small improvement seen did not support a goal of improved resource use.

Full Text

Duke Authors

Cited Authors

  • Horton, JK; Halle, JS; Chang, SX; Sartor, CI

Published Date

  • January 1, 2006

Published In

Volume / Issue

  • 64 / 1

Start / End Page

  • 168 - 175

PubMed ID

  • 16198507

Pubmed Central ID

  • 16198507

International Standard Serial Number (ISSN)

  • 0360-3016

Digital Object Identifier (DOI)

  • 10.1016/j.ijrobp.2005.07.004

Language

  • eng

Conference Location

  • United States