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目的:利用模体验证我院G3射波刀四种追踪方式(6D颅骨追踪、脊柱追踪、金标追踪、呼吸追踪)的治疗精度,为临床治疗提供依据。方法:利用我院的GE64排CT获取头颈肩模体、同步呼吸追踪模体在特定扫描参数下的影像数据,将所得数据传输到射波刀系统工作站,运用Multiplan计划系统分别进行治疗计划设计,将装有EBT3空白胶片的模体放于治疗床上,执行模体计划。再使用E2E软件分别处理曝光后的胶片,计算出6D颅骨追踪、脊柱追踪、金标追踪和呼吸追踪这四种追踪方式的照射精度。结果:6D颅骨追踪的精度为0.57 mm,脊柱追踪的精度为0.65 mm,金标追踪精度为0.71mm,呼吸追踪的精度为0.97 mm。结论:我院G3射波刀对动态目标的治疗精度<1.5mm,对固定目标的治疗精度<0.95mm,可以完好地满足放
OBJECTIVE: To verify the accuracy of the four tracking methods (6D skull tracking, spine tracking, gold tracking, and respiration tracking) of G3 radiosurgery in our hospital by using phantom to provide the basis for clinical treatment. Methods: The head and neck shoulder phantom was acquired by GE64 CT in our hospital. The image data of the phantom was tracked synchronously with the scanning parameters. The data were transmitted to the workstation of the Cyberknife system. The treatment plans were designed by Multiplan system, Place the phantom with EBT3 blank film on the couch and perform the phantom plan. The E2E software was used to process the exposed film separately to calculate the illumination accuracy of the four tracking methods of 6D skull tracking, spine tracking, gold tracking and breathing tracking. Results: The precision of 6D skull tracking was 0.57 mm, the accuracy of spinal tracking was 0.65 mm, the gold tracking accuracy was 0.71 mm, and the accuracy of respiratory tracking was 0.97 mm. Conclusion: The treatment accuracy of dynamic target of G3 radiosurgery in our hospital is less than 1.5mm, and the precision of treatment to fixed target is less than 0.95mm,