The effect of whole breast irradiation with coplanar three field technique in breast cancer patients onto hearth and LAD doses [Meme kanserli olgularda 3 alanlı koplanar teknikle tüm meme ışınlamasının kalp ve LAD dozlarına etkisi]

Abstract

Objectives We evaluate the effect of two conformal technique at Turkish women contour which developed order to reduce the lung dose in whole breast radiotherapy at European breast cancer patients. Methods CTV, PTV, lung, heart, contralateral breast and LAD were contoured on 20 patients referred for breast radiotherapy. Treatment planning were made as conventional technique (2F-C), two field non-coplanar conformal technical (2F-NC), 3 field coplanar conformal technique (3F-C) at Varian Eclipse TPS. Critical doses were evaluated at DVH. Conformity and homogeneity index was calculated. Comparison of three groups made by Kruskal-Wallis test, two separate groups by Mann-Whitney U test. Results Statistically significant differences in favor of 3F-C were detected on hearth, LAD, contralateral breast doses. Homogeneity and conformity index was higher for all patients in 3F-C technique. Conclusion 3F-C technique is adequate for dosimetric aspects and can be considered in Turkish women especially have coronary artery disease. © 2014 Turkish Society for Radiation Oncology.