齐齐哈尔医学院学报
齊齊哈爾醫學院學報
제제합이의학원학보
Journal of Qiqihar University of Medicine
2015年
30期
4556-4558
,共3页
CBCT%sentinel激光扫描系统%摆位误差%胸腹部肿瘤
CBCT%sentinel激光掃描繫統%襬位誤差%胸腹部腫瘤
CBCT%sentinel격광소묘계통%파위오차%흉복부종류
CBCT%Sentinel laser scan system%Setup errors%Thoracic and abdominal tumors
目的 比较CBCT影像系统和Sentinel激光扫描系统对胸腹部肿瘤患者摆位误差测量结果的优劣. 方法 选取19例胸腹部肿瘤IMRT患者,放疗前行CBCT扫描,扫描的同时进行Sentinel激光扫描系统扫描并成像,得出x、y、z三个线性方向和u,v,w(绕x轴、y轴和z轴)的三个旋转方向的摆位误差值,并对两种测量结果行配对t检验. 结果 用CBCT每例患者摆位验证需114 s,而Sentinel仅需5 s. 测量结果显示,两组数据线性误差在z轴(上下方向)存在差异(t=-4.243,P<0.05),旋转误差在v方向(绕y轴方向)上存在差异(t=5.667,P<0.05),其它方向差异不大. 结论 CBCT对胸腹部肿瘤患者摆位误差的测量结果大部分优于Sentinel激光扫描系统,CBCT能对患者治疗摆位进行较为准确测量及校正,可作为治疗前的摆位校正依据. Sentinel激光扫描系统应用直观、简便、耗时短、可实时追踪,适合在患者位置校正后进行辅助监测.
目的 比較CBCT影像繫統和Sentinel激光掃描繫統對胸腹部腫瘤患者襬位誤差測量結果的優劣. 方法 選取19例胸腹部腫瘤IMRT患者,放療前行CBCT掃描,掃描的同時進行Sentinel激光掃描繫統掃描併成像,得齣x、y、z三箇線性方嚮和u,v,w(繞x軸、y軸和z軸)的三箇鏇轉方嚮的襬位誤差值,併對兩種測量結果行配對t檢驗. 結果 用CBCT每例患者襬位驗證需114 s,而Sentinel僅需5 s. 測量結果顯示,兩組數據線性誤差在z軸(上下方嚮)存在差異(t=-4.243,P<0.05),鏇轉誤差在v方嚮(繞y軸方嚮)上存在差異(t=5.667,P<0.05),其它方嚮差異不大. 結論 CBCT對胸腹部腫瘤患者襬位誤差的測量結果大部分優于Sentinel激光掃描繫統,CBCT能對患者治療襬位進行較為準確測量及校正,可作為治療前的襬位校正依據. Sentinel激光掃描繫統應用直觀、簡便、耗時短、可實時追蹤,適閤在患者位置校正後進行輔助鑑測.
목적 비교CBCT영상계통화Sentinel격광소묘계통대흉복부종류환자파위오차측량결과적우렬. 방법 선취19례흉복부종류IMRT환자,방료전행CBCT소묘,소묘적동시진행Sentinel격광소묘계통소묘병성상,득출x、y、z삼개선성방향화u,v,w(요x축、y축화z축)적삼개선전방향적파위오차치,병대량충측량결과행배대t검험. 결과 용CBCT매례환자파위험증수114 s,이Sentinel부수5 s. 측량결과현시,량조수거선성오차재z축(상하방향)존재차이(t=-4.243,P<0.05),선전오차재v방향(요y축방향)상존재차이(t=5.667,P<0.05),기타방향차이불대. 결론 CBCT대흉복부종류환자파위오차적측량결과대부분우우Sentinel격광소묘계통,CBCT능대환자치료파위진행교위준학측량급교정,가작위치료전적파위교정의거. Sentinel격광소묘계통응용직관、간편、모시단、가실시추종,괄합재환자위치교정후진행보조감측.
Objective To measure the setup errors with CBCT imaging system and Sentinel laser scan system for the patient with thoracic and abdominal tumors and investigate the accuracy and practicality of them. Methods 19 patients with thoracic and abdominal tumors were included in this study, the first step took the CBCT images, then took the laser images while CBCT scanning.After this, we acquired the setup errors in x, y, z, u, v, w axies.The data of setup errors were compared with paired t-test.Results It took 114 s to complete the validating for each patient by CBCT system, while Sentinel system only needs 5s.The measurement results showed that two groups of data of linear error in the z axis, and rotating error in the v axis, the other direction had little difference.Conclusions The measurement results of setup errors for patients with thoracic and abdominal tumors show that CBCT is mostly better than Sentinel.CBCT can do better in accurate measurement and correction of the positioning treatment patients, it can be used as position adjustment basis before the treatment.Because of macroscopic, homely, spare time, Sentinel can be used easily as real-time monitoring after position correction by CBCT.
