Evaluation of Heterogeneity and Conformity Index Using IMRT and VMAT Techniques in Breast Cancer

Abstract

One of the most prevalent cancers in both men and women is breast cancer. A number of choice therapy covers surgery, radiotherapy, chemotherapy, and hormonal therapy. Radiotherapy is typically used as a cancer treatment because it can eliminate cancer cells and aid in preventing cancer recurrence following surgery. Dose planning must be completed before irradiating the patient. Planning is carried out in a treatment planning system (TPS) with several available technique options. In this study, we chose intensity-modulated radiotherapy (IMRT) and volumetric-modulated arc therapy (VMAT) techniques. To determine the quality of the dose planning of these two techniques, a comparison of the heterogeneity index (HI) and conformity index (CI) parameters was carried out. The results of the comparison between IMRT and VMAT show that VMAT is superior to IMRT in terms of homogeneity and conformity. This is consistent with the HI results on VMAT showing a mean of 1.060 while IMRT shows a mean of 1.081. In addition, the CI results at VMAT showed a mean of 0.641 while IMRT showed a CI value of 0.519.