Abstract:Objective To explore a method of determining internal target volume (ITV) for middle-inferior lung cancer according to the coordinate system of CT machine. Methods Three groups of CT images including: end of inspiratory, end of expiratory and free breathing were collected from 20 patients fixed with the thermoplastic molds. Then the ITV ranges of X (left-right), Y (head-foot) and Z direction (belly-back) were determined according to the CT images in which the tumor reach the maximum. Results The distance of X+ and X- respectively were (0.68±0.53) mm and (0.71±0.55) mm with P>0.05; the distance of Y+ and Y- respectively were (4.14±4.11) mm and (4.32±4.53) mm with P>0.05; the distance of Z+ and Z- were respectively (1.14±1.11) mm and (1.32±1.27) mm with P>0.05. The data in Y direction were different form that in X and Z direction (P<0.05). Conclusion For radiotherapy of middle-inferior lung tumor, this method might be used as an individual way to determine ITV by using general CT machine.
张广鹏,杨波,孙小杨,庞皓文,石翔翔,陈仁金,唐涛,吴敬波. 利用普通放疗定位CT机个体化确定肺部肿瘤内靶区的方法[J]. 中国医疗设备, 2018, 33(5): 60-62.
ZHANG Guangpeng, YANG Bo, SUN Xiaoyang, PANG Haowen, SHI Xiangxiang, CHEN Renjin, TANG Tao, WU Jingbo. Study of Individual Method of Determining Internal Target Volume in
Lung Cancer by Using Conventional CT Machine. China Medical Devices, 2018, 33(5): 60-62.