Comparison of conventional and conformal radiotherapy and different irradiation technique by 3D-TPS for esophageal carcinoma : a dosimetric study / 中国癌症杂志

ABSTRACT

Purpose:To obtain the optimum irradiation technique in different plans of conventional radiotherapy(2DRT)and conformal radiotherapy(3DCRT)and between different conformal radiotherapy techniques for esophageal carcinoma as compared by 3D-TPS.Methods:10 patients with esophageal carcinoma were enrolled in this study.The conventional treatment plan and four conformal technique plans were created for each patient.Plan 1 was the same as the 2DRT,plan 2 consisted of anterior and two posterior oblique fields,plan 3 consisted of posterior and two anterior oblique fields,plan 4 consisted of 2 dynamic arc fields.Different plans were compared using DVH.Results:①On average,PTV of 2DRT was the same as that of 3DCRT in DVH.The difference in maximum dose to spinal cord was obvious.The left lung dose in D_(mean)?D_(min)?V_(30) in 2DRT was significantly increased as compared to 3DCRT(P