中华放射肿瘤学杂志
中華放射腫瘤學雜誌
중화방사종류학잡지
CHINESE JOURNAL OF RADIATION ONCOLOGY
2015年
2期
193-195
,共3页
应微%何友安%何勇%张德康
應微%何友安%何勇%張德康
응미%하우안%하용%장덕강
X线图像引导系统%六维移动治疗床%摆位误差
X線圖像引導繫統%六維移動治療床%襬位誤差
X선도상인도계통%륙유이동치료상%파위오차
X-ray image guide system%Six degree mobile treatment bed%Setup error
目的 研究头部肿瘤在ExacTracX线图像引导系统下的摆位误差及影响因素.方法 随机选取10例行头部肿瘤放疗患者,应用头膜和框架固定,红外线标记摆位后采用ExaeTrac X线图像引导系统拍摄双侧斜位交叉X线射野照片,并与计划的DRR进行配准,得到左右方向、上下方向、前后方向的平移误差和旋转误差.配对t检验两两方向间差异.结果 10例患者左右方向、上下方向、前后方向的平移误差和旋转误差分别为(0.57±0.24)、(0.68±0.19)、(1.54±0.29) mm和(0.54±0.13)°、(0.60±0.23)°、(0.51±0.15)°,前后方向平移误差稍大(P=0.02、0.01),其余方向平移误差和全部旋转误差均相近(P=0.06,0.10～0.41).结论 应用ExaeTrac X线图像引导系统配合六维移动治疗床在头部肿瘤放疗是可行的,平移误差和旋转误差均控制在可接受范围.并可通过更换红外线球体、减少污染红外线小球来进一步提高治疗精度,为临床放疗提供质量保证.
目的 研究頭部腫瘤在ExacTracX線圖像引導繫統下的襬位誤差及影響因素.方法 隨機選取10例行頭部腫瘤放療患者,應用頭膜和框架固定,紅外線標記襬位後採用ExaeTrac X線圖像引導繫統拍攝雙側斜位交扠X線射野照片,併與計劃的DRR進行配準,得到左右方嚮、上下方嚮、前後方嚮的平移誤差和鏇轉誤差.配對t檢驗兩兩方嚮間差異.結果 10例患者左右方嚮、上下方嚮、前後方嚮的平移誤差和鏇轉誤差分彆為(0.57±0.24)、(0.68±0.19)、(1.54±0.29) mm和(0.54±0.13)°、(0.60±0.23)°、(0.51±0.15)°,前後方嚮平移誤差稍大(P=0.02、0.01),其餘方嚮平移誤差和全部鏇轉誤差均相近(P=0.06,0.10～0.41).結論 應用ExaeTrac X線圖像引導繫統配閤六維移動治療床在頭部腫瘤放療是可行的,平移誤差和鏇轉誤差均控製在可接受範圍.併可通過更換紅外線毬體、減少汙染紅外線小毬來進一步提高治療精度,為臨床放療提供質量保證.
목적 연구두부종류재ExacTracX선도상인도계통하적파위오차급영향인소.방법 수궤선취10례행두부종류방료환자,응용두막화광가고정,홍외선표기파위후채용ExaeTrac X선도상인도계통박섭쌍측사위교차X선사야조편,병여계화적DRR진행배준,득도좌우방향、상하방향、전후방향적평이오차화선전오차.배대t검험량량방향간차이.결과 10례환자좌우방향、상하방향、전후방향적평이오차화선전오차분별위(0.57±0.24)、(0.68±0.19)、(1.54±0.29) mm화(0.54±0.13)°、(0.60±0.23)°、(0.51±0.15)°,전후방향평이오차초대(P=0.02、0.01),기여방향평이오차화전부선전오차균상근(P=0.06,0.10～0.41).결론 응용ExaeTrac X선도상인도계통배합륙유이동치료상재두부종류방료시가행적,평이오차화선전오차균공제재가접수범위.병가통과경환홍외선구체、감소오염홍외선소구래진일보제고치료정도,위림상방료제공질량보증.
Objective To study the ExacTrac X-ray image guide system for patients with head and neck cancer.Methods Ten patients were chosen foe this study.It was immoblized using the head mask and frame fixtures.The two KV X-ray units were matched with the digitally reconstructed radiographs after positioning with the infrared markers.Then the setup errors on x (horizontal axis),y (vertical axis) and z (up-down) directions and rotation errors were obtained.Paired t-test between any two direction difference errors.Results The setup errors with ExacTrac X-ray image guide system for the patients in x,y,z directions and rotation errors were (0.57 ± 0.24) mm,(0.68 ± 0.19) mm,(1.54 ± 0.29) mm,(0.54 ±0.13) °,(0.60 ± 0.23) °,(0.51 ± 0.15) °.The z-axis direction have slightly larger error (P =0.02,0.01).The others have not statistical significance (P =0.06,0.10-0.41).Conclusions To use ExacTrac X-ray image guide system cooperating with the six degree of freedom treatment couch in image guided radiotherapy for is feasible,the motion errors ＜ 2 mm,the rotation errors ＜ 2°.Reduced of the setup errors with replace the sphere or to reduce pollution of the sphere,improve the accuracy,it could provide a better quality assurance in radiation therapy.
