Abstract：Objective To investigate the location conditions of spiral CT in Cyberknife radiotherapy. Methods Siemens big bore 64
slice spiral CT was used to scan the chest tumor phantom with different pitch and reconstruction slice thickness. The tumor phantom
volume, length and CT value with the software of Siemens CT workstation was measured and the changes of the tumor volume,
length and CT value was observed. Results Different scanning pitch had no effect on tumor volume, tumor length and CT value. The
tumor volume and CT value decreased with the increase of the thickness of the reconstructed layer. The tumor size increased with the
thickness of the reconstructed layer. When the slice thickness was more than 1.5 mm, the tumor volume was significantly decreased
with the thickness of the reconstructed layer. When the reconstruction slice thickness was 5 mm, the tumor volume changeed up to
23%. Conclusion In order to ensure the quality of cyberknife radiotherapy, the CT location condition should be executed strictly in
cyberknife locating requirements.
陈国梁，赵瑞，李俊杰，李莎. 射波刀放疗中相关螺旋CT定位条件的探讨[J]. 中国医疗设备, 2018, 33(5): 90-92.
CHEN Guoliang, ZHAO Rui, LI Junjie, LI Sha. Discussion of the Location Conditions of Spiral CT in Cyberknife Radiotherapy. China Medical Devices, 2018, 33(5): 90-92.
