中外健康文摘
中外健康文摘
중외건강문적
WORLD HEALTH DIGEST
2013年
30期
108-109
,共2页
王成都%孙龙%翁邓胡%陈维军%许亚萍
王成都%孫龍%翁鄧鬍%陳維軍%許亞萍
왕성도%손룡%옹산호%진유군%허아평
肺癌%体部立体定向放射治疗%摆位误差%锥形束CT
肺癌%體部立體定嚮放射治療%襬位誤差%錐形束CT
폐암%체부입체정향방사치료%파위오차%추형속CT
目的：比较肺部SBRT患者因摆位流程不同而引起的误差。方法22例肺部SBRT患者按摆位方式不同分为单线组与双线组进行治疗摆位。单线组仅在等中心点处勾画一组标记线；双线组为在患者体表的等中心点处和肚脐处分别勾画两组摆位标记线。对于双线组，治疗摆位时还需要移动治疗床，以检验加速器X轴激光线是否对准肚脐处的标记线。所有患者在摆位结束后治疗前，获取患者CBCT图像，利用图像配准软件和计划CT图像进行自动配准，然后由技师和物理师分别进行手动配准。记录移动误差，并对两种摆位流程的误差进行比较。结果11例单线组患者共进行CBCT扫描80次；11例双线组患者共进行CBCT扫描66次。单线组在3个方向上的摆位误差为（2.58±1.77）mm，（3.76±3.45）mm，（1.64±1.25）mm，双线组患者在3个方向上（Lateral, Longitudinal, Vertical）的摆位误差为（2.70±2.13）m m,(2.00±1.77)m m,(1.82±1.57)m m。结论单线组和双线组的摆位误差平均值没有显著差异。双线组在头脚方向的摆位误差值小于单线组的对应数值。因此，在患者体表的肚脐处额外勾画一组标记线，并要求每次摆位时技师、医生和物理师同时在场可能有助于减少肺部SBRT患者的摆位不确定性。
目的：比較肺部SBRT患者因襬位流程不同而引起的誤差。方法22例肺部SBRT患者按襬位方式不同分為單線組與雙線組進行治療襬位。單線組僅在等中心點處勾畫一組標記線；雙線組為在患者體錶的等中心點處和肚臍處分彆勾畫兩組襬位標記線。對于雙線組，治療襬位時還需要移動治療床，以檢驗加速器X軸激光線是否對準肚臍處的標記線。所有患者在襬位結束後治療前，穫取患者CBCT圖像，利用圖像配準軟件和計劃CT圖像進行自動配準，然後由技師和物理師分彆進行手動配準。記錄移動誤差，併對兩種襬位流程的誤差進行比較。結果11例單線組患者共進行CBCT掃描80次；11例雙線組患者共進行CBCT掃描66次。單線組在3箇方嚮上的襬位誤差為（2.58±1.77）mm，（3.76±3.45）mm，（1.64±1.25）mm，雙線組患者在3箇方嚮上（Lateral, Longitudinal, Vertical）的襬位誤差為（2.70±2.13）m m,(2.00±1.77)m m,(1.82±1.57)m m。結論單線組和雙線組的襬位誤差平均值沒有顯著差異。雙線組在頭腳方嚮的襬位誤差值小于單線組的對應數值。因此，在患者體錶的肚臍處額外勾畫一組標記線，併要求每次襬位時技師、醫生和物理師同時在場可能有助于減少肺部SBRT患者的襬位不確定性。
목적：비교폐부SBRT환자인파위류정불동이인기적오차。방법22례폐부SBRT환자안파위방식불동분위단선조여쌍선조진행치료파위。단선조부재등중심점처구화일조표기선；쌍선조위재환자체표적등중심점처화두제처분별구화량조파위표기선。대우쌍선조，치료파위시환수요이동치료상，이검험가속기X축격광선시부대준두제처적표기선。소유환자재파위결속후치료전，획취환자CBCT도상，이용도상배준연건화계화CT도상진행자동배준，연후유기사화물리사분별진행수동배준。기록이동오차，병대량충파위류정적오차진행비교。결과11례단선조환자공진행CBCT소묘80차；11례쌍선조환자공진행CBCT소묘66차。단선조재3개방향상적파위오차위（2.58±1.77）mm，（3.76±3.45）mm，（1.64±1.25）mm，쌍선조환자재3개방향상（Lateral, Longitudinal, Vertical）적파위오차위（2.70±2.13）m m,(2.00±1.77)m m,(1.82±1.57)m m。결론단선조화쌍선조적파위오차평균치몰유현저차이。쌍선조재두각방향적파위오차치소우단선조적대응수치。인차，재환자체표적두제처액외구화일조표기선，병요구매차파위시기사、의생화물리사동시재장가능유조우감소폐부SBRT환자적파위불학정성。
[Objective] To compare setup errors in lung cancer SBRT due to different setup procedures.[method] 22 lung cancer cases were separated into two groups. Patients in single line group were marked at iso-center only. Patients were marked at both iso-center and navel in double line group. For double line group, couch was moved to double check whether the navel marker was overlap with laser. The CBCT images were retrieved to fusion with planning CT in Varian OBI system by both automatic method and manual method. Setup errors were recorded to the purpose of evaluating these two groups.[result] There were 80 setup data for single line group with 11 cases and 66 setup data for double line group with 11 cases . The setup errors in 3 direction for single line group were (2.58±1.77)mm,(3.76±3.45)mm, (1.64±1.25)mm.The setup errors in 3 direction (Lateral, Longitudinal, Vertical)for double line group were (2.70±2.13) mm,( 2.00±1.77)mm,( 1.82±1.57)mm.separately.[conclusion] There was no significant difference of average setup error in two groups. Double line group has less Setup errors in superior-inferior than a single group. Mark an extra line in navel can reduce setup error in lung cancer SBRT. And it is necessary to ask radiation oncologist, physicist and technician in attendance.
