Application of Imaging-Guided Radiation Therapy in Pelvic Tumor Radiotherapy

VernacularTitle:图像引导放射治疗在盆腔肿瘤放疗中的应用研究
Author: Bing WU ¹ ; Junxiang HE ; Jingguo FU ; Changli RUAN
Author Information

1. 武汉大学人民医院肿瘤中心
Keywords: IGRT; pelvic cancer; setup errors
From: Chinese Journal of Medical Instrumentation 2015;(4):299-301
CountryChina
Language:Chinese
Abstract: Objective To discuss the influence of setup errors on the accuracy of pelvic cancer in IGRT, analysis setup errors and determine the CTV-to-PTV margins. Methods 60 pelvic cancer patients treated with Varian 23IX, al of them were performed by CBCT before and after-correction three times in the first week and after that once a week. Then, to measure the setup errors at X(left-right), Y(superior-inferior), Z(anterior-posterior) axis and E(coronal), F(sagittal), G(axial) rotation directions. Results 530 scans obtained in al , the setup errors in X, Y, Z, E, F, G were (-0.52±4.18) mm, (0.73±4.86) mm, (-0.36±3.62)mm, (0.14±1.20)o, (0.13±1.34)o, (0.21±1.73)o respectively and were much lower after correction at X, Y, Z axis, besides, CTV-to-PTV margins decrease a lot. Conclusion The accuracy of radiotherapy can be highly increased with the use of IGRT in pelvic cancer.