A comparative dosimetric study of left sided breast cancer after breast-conserving surgery treated with VMAT and IMRT.

ABSTRACT:

Background and purposes

This study compared VMAT and IMRT plans for intact breast radiotherapy for left sided breast cancer and evaluated the irradiated dose of planning target volume and OARs, especially focusing on heart and coronary artery.

Materials and methods

Eleven patients with left sided breast cancer whose breast was relatively smaller (the mean volumes is 296 cc) treated with breast-conserving surgery were prescribed radiotherapy of 50 Gy in 25 fractions using two or four-field step and shoot IMRT (2 or 4-F IMRT), and one or two-arc VMAT (1 or 2-arc VMAT). The 10 Gy electron boost to the tumor bed after delivery of 50 Gy was not included in the analysis. Multiple planning parameters for the PTV and the PRV-OARs were measured and analyzed.

Results

Treatment

SUBMITTER: Zhao H 

PROVIDER: S-EPMC4650319 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature