摘要
目的分析宫颈癌调强放疗体表标记线延长的摆位误差,探讨是否有利于改善患者在Orfit体架使用中体位的重复性和一致性。方法随机选取2020年8月至2021年7月在中山大学肿瘤防治中心接受根治术的40例宫颈癌调强放疗患者,根据体表标记线的延长分成A、B两组,每组各20例。其中A组患者体表标记线延长,两组患者在治疗前均使用B超膀胱容量测量仪(BS)测量膀胱充盈程度和锥形束CT扫描,获取患者左右、上下和前后3个方向的摆位误差并进行分析。结果两组患者在整个疗程中和不同的分次间左右、上下和前后3个方向上的摆位误差,差异有统计学意义(P<0.05)。与B组相比,A组在左右、上下和前后3个方向上分别能减少0.9 mm、1.3 mm和0.9 mm。结论Orfit体架固定中体表标记线的延长能够提高宫颈癌调强放疗的摆位精度。
【Objective】To analyze the set-up error of body surface marker line lengthening in intensity modulated radiation therapy(IMRT)for cervical cancer,and to explore whether it is beneficial to improve the repeatability and consistency of body position in Orfit frame use.【Methods】From August 2020 to July 2021,40 patients with cervical cancer who underwent IMRT radical operation in our hospital were selected.According to extension of body surface marker line,the patients were divided into A and B groups with 20 cases in each group.In Group A,the marked lines on the body surface were prolonged,and the degree of bladder filling was measured by bladder capacity scanner(BS)and cone beam CT before treatment in both groups,the set-up errors in the left-right,up-down,and front-back directions were obtained and analyzed.【Results】The set-up errors of the two groups in the whole course of treatment and in the three directions of left-right,up-down,and front-back were significant difference(P<0.05).Compared with Group B,Group A decreased 0.9 mm,1.3 mm and 0.9 mm in left-right,up-down,and front-back directions respectively.【Conclusion】The extension of body surface marking line in Orfit frame fixation can improve the setting precision of intensity-modulated radiotherapy for cervical cancer.
作者
黄家升
刘金迪
黄虹
郭桂灿
钟庆初
林承光
HUANG Jiasheng;LIU Jindi;HUANG Hong;GUO Guican;ZHONG Qingchu;LIN Chengguang(Cancer Center of Sun Yat-sen University/State Key Laboratory of Oncology in South China/Collaborative Innovation Center for Cancer Medicine,Guangzhou,Guangdong 510060,China)
出处
《中国医学工程》
2022年第12期47-50,共4页
China Medical Engineering
关键词
宫颈癌
调强放疗
摆位误差
锥形束扫描
膀胱容积
Cervical cancer
intensity modulated radiation therapy(IMRT)
set-up error
cone beam CT
bladder volume
