Abstract：Objective To analyze the clinical effectiveness of the respiratory movement in liver carcinoma patients by using the image guidance in HT (Helical Tomotherapy) with MVCT (Mega-Voltage Computerized Tomography). Methods Altogether 36 patients with primary or metastatic liver cancers were randomly selected and then underwent MVCT scans in the calm and shallow breathing state and DDR (Digital Reconstruction Radiograph) registration in the TPS (Treatment Planning Systems) twice, respectively taking the liver and liver lesions as well as the osseous markers and non-movement soft tissue as the references for registration, so as to acquire the respiratory mobility information of patients and analyze the registration principle and method. Results All the 36 patients were scanned by using MVCT for 768 times. The average phase error of respiratory mobility for all the patients in X, Y and Z were (3.05±0.5) mm (max for individual patients: 6.60 mm), (10.64±2.34) mm (max for individual patients: 26.70 mm) and (4.57±0.90) mm (max for individual patients: 11.30 mm), respectively, without statistically significant differences. Conclusion Liver cancer patients were greatly affected by respiratory movement registration errors. The respiratory training was necessary for patients in placement, in order to reduce the influence of respiratory movement on liver tumor radiotherapy. Meanwhile, the osseous markers and non-movement soft tissue shall be taken as the reference for registration. In case that the registration error > the range of target area, respiratory training and imaging registration should be considered for patients again.
何建军，田晓云，刘海，黄栋，柳杰，韩成龙. 螺旋断层放疗中肝脏肿瘤影像引导方法的研究[J]. 中国医疗设备, 2015, 30(12): 112-114.
HE Jian-jun, TIAN Xiao-yun, LIU Hai, HUANG Dong, LIU Jie, HAN Cheng-long. Research on Imaging Guidance in Helical Tomotherapy for Liver Carcinoma. China Medical Devices, 2015, 30(12): 112-114.
