CAJ | 학술논문

目的：提高放射治疗中真空垫摆位的精度。方法将200例使用真空垫进行摆位的患者随机分为两组，传统组（100例）使用传统方法进行摆位，改进组（100例）使用改进过的方法进行摆位，用锥形束CT（CBCT）系统分析两组首次摆位时的误差；将传统组再随机分为两组，一组（50例）定时对真空垫抽真空，另一组（50例）“适时”对真空垫抽真空，用CBCT系统分析两组第15次摆位时的误差。结果与传统组相比，改进组在X、Y、Z轴方向上的摆位误差均有明显改善（P＜0.05）；与“适时”抽气组相比，定时抽气组在X、Z轴方向摆位误差有明显改善（P＜0.05）。结论真空垫摆位的技术改进有效提高了摆位精度。
목적：제고방사치료중진공점파위적정도。방법장200례사용진공점진행파위적환자수궤분위량조，전통조（100례）사용전통방법진행파위，개진조（100례）사용개진과적방법진행파위，용추형속CT（CBCT）계통분석량조수차파위시적오차；장전통조재수궤분위량조，일조（50례）정시대진공점추진공，령일조（50례）“괄시”대진공점추진공，용CBCT계통분석량조제15차파위시적오차。결과여전통조상비，개진조재X、Y、Z축방향상적파위오차균유명현개선（P＜0.05）；여“괄시”추기조상비，정시추기조재X、Z축방향파위오차유명현개선（P＜0.05）。결론진공점파위적기술개진유효제고료파위정도。
Objective To improve the accuracy of radiotherapy positioning with vacuum cushion. Methods 200 patients who would undergo radiotherapy positioning with vacuum cushion were randomly divided into traditional group (100 cases) and improvement group (100 cases). The radiotherapy positioning of traditional group was conducted by using traditional method and that of improvement group was conducted by using improved method. The errors of the ifrst positioning of the two groups were analyzed through CBCT system. Patients in traditional group were randomly divided into timing exhaust group (50 cases) and timely exhaust group (50 cases). The vacuum pumping of timing exhaust group was conducted regularly and that of timely exhaust group was conducted in time. The errors of the 15th positioning of the two groups were analyzed through CBCT system. Results The positioning errors in X axis, Y axis and Z axis of improvement group were signiifcantly lower than those of traditional group (P<0.05). The positioning errors in X axis and Z axis of timing exhaust group were signiifcantly lower than those of timely exhaust group (P<0.05). Conclusion Technical improvement of radiotherapy positioning with vacuum cushion has improved the radiotherapy positioning accuracy.