论文部分内容阅读
Objective To provide improved manipulative program of body X knife therapy is to reduce localization and repetition error, increase therapeutic precision and perform accurate quality control.Methods Measure and compare the actual error in 86 therapeutic targets of 52 patients before body X knife stereotactic radiotherapy at different positioning.Results The position error is reduced obviously in quality control group compared with control group.There is prominent difference in two groups about the error of irradiation field accuracy and axial superposition(P value: 0.000896 and 0.02980).Conclusions The improved positioning method can reduce errors and increase repetition precision andveracity in therapy.