期刊论文

Evaluation of actual doses to bladder and rectum during image-guided volumetric modulated arc therapy for cervical cancer

中文

中国医学物理学杂志

1005-202X

2019

36

2

142-145

10.3969/j.issn.1005-202X.2019.02.004

福建省自然科学基金(2015J01366) 福建省医学创新课题(2017-CX-8) 福建省卫生计生中青年骨干人才培养项目(2017-ZQN-15).

本校为其他机构

目的:研究宫颈癌容积旋转调强放疗过程中,利用图像引导技术评估膀胱与直肠因平移摆位误差因素对受照剂量的影响。方法:入组2017年2~4月的25例行容积旋转调强放疗的宫颈癌病人。在计划CT图像和首次摆位的锥形束 CT(CBCT)图像中勾画出膀胱和直肠。然后根据首次摆位误差,对膀胱和直肠在前后、左右、头脚方向上进行相应的平移。分别比较计划设计与加入平移摆位误差下的膀胱和直肠剂量差异,并用配对t检验分析差异。结果:在计划CT与CBCT图像上勾画出的直肠体积为(33.0±16.0)和(21.8±16.5)cm~3,膀胱体积为(387.1±222.3)和(227.8±107.3)cm~3。在计划CT图像与考虑平移摆位误差的CBCT图像上,直肠的V50...

Objective To evaluate the effects of translational setup errors on the doses to bladder and rectum during imageguided volumetric modulated arc therapy for cervical cancer. Methods Twenty-five patients receiving volumetric modulated arc therapy for cervical cancer from February 2017 to April 2017 were enrolled in this study. Bladder and rectum were delineated on the planning computed tomography (CT) images and the cone beam CT (CBCT) images obtained in the first treatment fraction. Then, bladder and rectum were shifted in the anterior-posterior,...