Dosimetric comparison of irradiated small bowel volume with intensity modulated radiotherapy and volumetric modulated arc therapy in adjuvant pelvic radiation therapy for endometrial carcinoma

Newer treatment techniques help in reducing dose to small bowel (SB) which is an organ at risk (OAR) for pelvic radiotherapy (RT). However, instead of SB, bag contoured routinely and constraints are given. In this retrospective case series, we compared the received by SB while using intensity modulated radiation therapy (IMRT) volumetric-modulated arc (VMAT) patients receiving adjuvant RT endometrial carcinoma. 10 with stage II EC who VMAT were included single institution study. was retrospectively planning computed tomography scan these patients. An IMRT plan also generated a similar target volume coverage previously approved plan. Volume Gy, 20 30 40 Gy 45 analysed dosimetric comparison made among two plans. Anaylysis variance (ANOVA) unpaired t tests used comparison. Mean (V10 Gy) 85.3% 83.7% respectively. (V45 4.1% 5% No statistically significant difference noted low or high irradiated both techniques; however, getting absence optimisation found be groups can translate acute late toxicity. Further prospective studies have conducted know clinical significance dose-volume relationship SB.