Evaluation on the dose distribution of routine radiotherapy plan of esophageal cancer with 3D- planning system
- VernacularTitle:三维治疗计划系统对胸部食管癌常规放疗计划肿瘤剂量的评估
- Author:
Haifeng WANG
;
Jingrong ZHANG
;
Juwu WANG
;
Yihai WANG
- Publication Type:Journal Article
- Keywords:
Esophageal neoplasms;
3D treatment planning system;
Dose volume histogram
- From:
Cancer Research and Clinic
2001;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the tumor dose distribution of routine radiotherapy plan in esophageal cancer with 3D treatment planning system. Methods For the 19 esophageal cancer patients who were diagnosed, the thoracic CT were done and GTV, CTV and PTV were delineated on the image of CT. Then a routine 3 field radiotherapy planning was produced using the Cad Plan 6.4.7 treatment planning system. The dosimetric results of GTV, CTV and PTV, target conformity and the dosimetric uniformity of variant target volume gained from DVH were compared. Results The maximal dose of GTV, CTV and PTV was 51.64Gy, 51.94Gy, 51.48Gy, respectively; the minimal dose was 41.17 Gy, 25.31 Gy, 18.94 Gy, respectively; the mean dose was 49.5 Gy, 47.34 Gy, 42.92 Gy, respectively; the conformity index was 0.94, 0.69, 0.38, respectively; and the dose variability was 2.2 Gy, 7.57 Gy, 14.56 Gy. Conclusions The routine radiotherapy plan in esophageal cancer could not offer satisfactory dose distribution. The method of CT simulation and 3D treatment planning systems should be applied to decide treatment planning.
