Optimization of Strategy for Image Guided Radiotherapy in Tomotherapy
- VernacularTitle:螺旋断层放疗图像引导策略的优化探讨
- Author:
yan Wen YAO
1
;
wen Jian HUANG
;
guang Xuan CHEN
;
kui Sen XU
Author Information
1. 华南国家肿瘤实验室//中山大学肿瘤防治中心放疗科
- Keywords:
tomotherapy;
MVCT;
position error;
scanning frequency
- From:
Journal of Sun Yat-sen University(Medical Sciences)
2017;38(6):921-925
- CountryChina
- Language:Chinese
-
Abstract:
[Objective]To explore the different scanning frequency for the MVCT scanning in the tomotherapy , and seek the best strategy of the scanning.[Methods]Patients were treated by tomotherapy in SYSUCC from January 1, 2015 to May 15, 2016, includ?ing 88 head&neck patients, 63 chest&abdomen patients and 19 pelvis patients. All patients have had a daily MVCT scanning for po?sition verification before the treatment. The data retrieved from"the first five times of the very first week"and"the every first time of each week", were compared with"the whole course"data, respectively.[Results]There are no significant difference between"the whole course"and"the first five times of the very first week"or"the every first time of each week"for pelvis patients and chest and abdomen patients. There are significant differences between Z axis of"the whole course"and"the first five times of the very first week"only for head&neck patients.[Conclusion]It is a good scanning choice of"the first five times of the very first week"and"the every first time of each week"for the those patients with thoracic&abdominal or pelvic tumors to reduce the extra radiation dose from the MVCT. There are significant differences between Z axis of"the whole course"and"the first five times of the very first week"in the head&neck patients. Therefore,"the first five times of the very first week"cannot be used as a solid position information for daily verification. And"the every first time of each week"may be a good compromise solution.
