肿瘤预防与治疗2012，Vol.25Issue(6)：351-353,3.DOI:10.3969/j.issn.1674-0904.2012.06.005
ExacTrac X线图像引导系统在胸部肿瘤治疗应用的初步评估
Preliminary Assessment on the Application of ExacTrac X Ray Image Guide System for the Therapy of Thoracic Tumor
摘要
Abstract
Objective: To compare the accuracy of the infrared markers with the X ray image guide system, cooperating with the six degree mobile treatment bed in Intensity Modulated Radiation Therapy(IMRT) for thoracic tumor while positioning. And to assess the application feasibility of these two ways. Methods: Eight patients with thoracic tumor accepting IMRT were chosen. The cross X-ray radiation field photos taken by ExacTrac X-ray image guide system were matched with the DRR after positioning with the infrared markers. Then the motion errors on X、Y and Z directions and rotation errors (6D errors) were obtained and corrected. After that, the 6D errors of the patients were verified using the x-ray image guide system again. Results: The errors occurred in the infrared markers positioning on X、Y、Z directions were( 1. 64 ±1. 42)mm、(2. 35 ± 1. 89) mm and(2. 81 ± 1. 74) mm respectively, and the rotation errors spinning X, Y,Z axis were(0. 96 ±0. 87) °、( 1. 27 ± 1. 05 ) ° and( 1. 42 ± 0. 99) °respectively. After verified by the x-ray image guide system, the position errors on X、Y、Z directions were(0.28 ±0. Ll)mm^(0.43 ±0. 14)mm and (0.43 ±0. 14)mm respectively , and the rotation errors were all less than 0. 5 °. The three position errors and the three rotation errors verified by the x-ray image guide were obviously less than which verified by the infrared markers. The differences were significant(P < 0. 01). Conclusion: It is feasible to use ExacTrac X-ray image guide system cooperating with the six degree mobile treatment bed in IMRT for the therapy of thoracic tumors with markedly reduced position errors of the treatment.关键词
胸部肿瘤/6维移动治疗床/在线匹配/IGRTKey words
Thoracic Tumor/Six Degree Mobile Treatment Bed/Online Match/IGRT分类
医药卫生引用本文复制引用
高绪峰,梁黎,吴德全,何勇,张德康..ExacTrac X线图像引导系统在胸部肿瘤治疗应用的初步评估[J].肿瘤预防与治疗,2012,25(6):351-353,3.基金项目
四川省科技厅科技支撑项目:编号05SG0932. （）
