Study on TPS Dose Distribution of Radiation Therapy with Wedge for Upper-thoracic Esophageal Cancer
- VernacularTitle:楔形板在胸上段食管癌放疗中对TPS剂量分布影响探讨
- Author:
Xin LIN
;
Yongquan MA
- Publication Type:Journal Article
- Keywords:
radiation therapy;
dose-volume histogram;
esophageal cancer
- From:
Chinese Medical Equipment Journal
1989;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the TPS dose distribution of the radiation therapy with wedge for upper-thoracic esophageal cancer.Methods Adopting spiral CT scanning,three dimensional data of the focus of infection and the other tissues were acquired.The radiotherapy plans with 45? wedges and without wedge were designed in TPS.The dose-volume histogram were calculated and compared.Results Although the average of dose of irradiated target was very close in the two plans,but there was remarkable difference in the dose uniformity.The Std(standard deviation) of dose in irradiated target was 6.31 in plan without wedge,and it was 4.45 in plan with the 45? wedge.The results show that the dose distri-butions of irradiated target are optimized by using the wedge.Conclusion It is a simple and effective method to use wedge for improving dose distribution in the radiation therapy for upper-thoracic esophageal cancer.
