中华放射肿瘤学杂志
中華放射腫瘤學雜誌
중화방사종류학잡지
CHINESE JOURNAL OF RADIATION ONCOLOGY
2011年
3期
233-235
,共3页
焦升超%戴建荣%王维虎%门阔%李明辉%符贵山%毕楠%李晔雄
焦升超%戴建榮%王維虎%門闊%李明輝%符貴山%畢楠%李曄雄
초승초%대건영%왕유호%문활%리명휘%부귀산%필남%리엽웅
正交千伏级X线透视图像%体层摄影术,X线计算机,锥形束%数字重建射野影像%图像配准
正交韆伏級X線透視圖像%體層攝影術,X線計算機,錐形束%數字重建射野影像%圖像配準
정교천복급X선투시도상%체층섭영술,X선계산궤,추형속%수자중건사야영상%도상배준
Orthogonal kilo-voltage fluoroscopic imaging%Tomography,X-ray computed,conebeam%Digitally reconstructed radiograph%Image registration
目的 评价正交千伏级X线透视图像(OKVFI)对肝癌术后植入银环放疗患者修正摆位误差的可行性.方法 在带千伏级X线容积成像(XVI)系统加速器上每次对患者摆位后分别在planar View模式下获取多帧合成的平均化OKVFI和在volume View模式下获取锥形束CT(CBCT)图像.共得到10例患者OKVFI和CBCT图像各90套.将OKVFI与基于四维CT得到的数字重建射野影像配准得到的摆位数据以及CBCT图像与四维CT图像配准后得到的摆位数据进行比较.用Pearson法相关分析两种配准方法 相关性及一致性的可信区间(CI).结果 两种配准方法 在左右、前后、头脚方向上的相关系数分别为0.821、0.771、0.909,95%CI分别为-2.30～1.53、-2.06～3.01、-2.69～1.53,3mm内摆位误差占总摆位误差的百分比分别为97.78%、95.56%、96.67%.结论 OKVFI在确定肝癌患者摆位误差方面与CBCT图像有高度相关性和一致性,利用它修正肝癌患者摆位误差是可行的.
目的 評價正交韆伏級X線透視圖像(OKVFI)對肝癌術後植入銀環放療患者脩正襬位誤差的可行性.方法 在帶韆伏級X線容積成像(XVI)繫統加速器上每次對患者襬位後分彆在planar View模式下穫取多幀閤成的平均化OKVFI和在volume View模式下穫取錐形束CT(CBCT)圖像.共得到10例患者OKVFI和CBCT圖像各90套.將OKVFI與基于四維CT得到的數字重建射野影像配準得到的襬位數據以及CBCT圖像與四維CT圖像配準後得到的襬位數據進行比較.用Pearson法相關分析兩種配準方法 相關性及一緻性的可信區間(CI).結果 兩種配準方法 在左右、前後、頭腳方嚮上的相關繫數分彆為0.821、0.771、0.909,95%CI分彆為-2.30～1.53、-2.06～3.01、-2.69～1.53,3mm內襬位誤差佔總襬位誤差的百分比分彆為97.78%、95.56%、96.67%.結論 OKVFI在確定肝癌患者襬位誤差方麵與CBCT圖像有高度相關性和一緻性,利用它脩正肝癌患者襬位誤差是可行的.
목적 평개정교천복급X선투시도상(OKVFI)대간암술후식입은배방료환자수정파위오차적가행성.방법 재대천복급X선용적성상(XVI)계통가속기상매차대환자파위후분별재planar View모식하획취다정합성적평균화OKVFI화재volume View모식하획취추형속CT(CBCT)도상.공득도10례환자OKVFI화CBCT도상각90투.장OKVFI여기우사유CT득도적수자중건사야영상배준득도적파위수거이급CBCT도상여사유CT도상배준후득도적파위수거진행비교.용Pearson법상관분석량충배준방법 상관성급일치성적가신구간(CI).결과 량충배준방법 재좌우、전후、두각방향상적상관계수분별위0.821、0.771、0.909,95%CI분별위-2.30～1.53、-2.06～3.01、-2.69～1.53,3mm내파위오차점총파위오차적백분비분별위97.78%、95.56%、96.67%.결론 OKVFI재학정간암환자파위오차방면여CBCT도상유고도상관성화일치성,이용타수정간암환자파위오차시가행적.
Objective The aim of this study is to evaluate the feasibility of using orthogonal kilo voltage fluoroscopic imaging(OKVFI)for setup correction in image guided radiotherapy of the liver.Methods After positioned the patients with liver cancer implanted with silver rings on the accelerator equipped with kilo voltage X-ray volume imaging(XVI),averaged OKVFI and cone beam CT(CBCT) volumetric images were acquired.A total of 90 datasets of averaged OKVFI and 90 datasets of volumetric images for 10 patients were obtained.The couch shifts obtained by the matching between OKVFI and digitally reconstructed radiograph were compared tu those achieved by the registration between CBCT and 4D reference average CT.On the comparison of the two different matching metheds.the Pearson coefficient was used to analyzed the correlation and Bland-Altman analysis to discern the consistence.Results The Pearson coefficient of correlation for the patient position shifts were R2=0.821.0.771 and 0.909 in the left-right (LR),anterior-posterior(AP)and superior-inferior(SI)directions respectively.95% CI were-2.30 -1.53(LR),-2.06-3.01(AP)and-2.69-1.53(SI)respectively.Within a±3 mm tolerance were 97.78%.95.56%and 96.67%respectively.Conclusions OKVFI has hish correlation and consistence with CBCT image on the setup correction.It is feasible to implement position correction with OKVFI in clinic practice.
