CAJ | 학술논문

目的探讨将侧位脑血管数字图像进行反向转动后配准减影的可行性及其价值.方法 (1)实验研究:在笔者用Visual Basic编写的旋转配准减影软件中对试验靶片直接进行减影处理和将靶片旋转角度后再进行减影处理.观察软件的自动旋转角度探测功能是否探测出直线旋转的角度以及减影功能是否正常.(2)患者图像回顾性研究:将15例在侧位脑血管成像过程中靶血管围绕冠状轴发生了转动的图像读入软件.对同一组蒙靶片分别进行传统的配准减影和先反转一定角度后再进行传统配准减影处理.(3)评价:由4名相关专业的高级职称医师一起对这两组图像进行对比读片.结果 (1)软件配备的自动旋转角度探测功能提示靶片应逆时针方向旋转1.3..软件减影结果正确.(2)在回顾性研究中,用传统减影方法获得较清晰图像3例,在经反转配准减影处理后,伪影明显减少,图像更加清晰；经传统配准减影后有明显伪影的图像10例,在经反转配准减影处理后,获得清晰图像,末梢的血管影像也得以显示；经传统配准减影后无法辨认的图像2例,经过反转配准减影后达到诊断要求.(3)评价结果:反转配准减影的噪声控制和血管细节显示能力都优于传统配准方法；图像没有变形失真；图像清晰度稍有下降.结论反向转动配准减影技术能明显提高侧位脑血管数字减影图像的质量.
목적 탐토장측위뇌혈관수자도상진행반향전동후배준감영적가행성급기개치.방법 (1)실험연구:재필자용Visual Basic편사적선전배준감영연건중대시험파편직접진행감영처리화장파편선전각도후재진행감영처리.관찰연건적자동선전각도탐측공능시부탐측출직선선전적각도이급감영공능시부정상.(2)환자도상회고성연구:장15례재측위뇌혈관성상과정중파혈관위요관상축발생료전동적도상독입연건.대동일조몽파편분별진행전통적배준감영화선반전일정각도후재진행전통배준감영처리.(3)평개:유4명상관전업적고급직칭의사일기대저량조도상진행대비독편.결과 (1)연건배비적자동선전각도탐측공능제시파편응역시침방향선전1.3..연건감영결과정학.(2)재회고성연구중,용전통감영방법획득교청석도상3례,재경반전배준감영처리후,위영명현감소,도상경가청석；경전통배준감영후유명현위영적도상10례,재경반전배준감영처리후,획득청석도상,말소적혈관영상야득이현시；경전통배준감영후무법변인적도상2례,경과반전배준감영후체도진단요구.(3)평개결과:반전배준감영적조성공제화혈관세절현시능력도우우전통배준방법；도상몰유변형실진；도상청석도초유하강.결론 반향전동배준감영기술능명현제고측위뇌혈관수자감영도상적질량.
Objective Investigate the value and feasibility of image registration with reverse rotation in lateral cerebral DSA.Methods ( 1 ) Experimental study:the target images were subtracted directly,and subtracted again after reverse rotation.Software of registration and subtraction with reverse rotation edited by the author utilizing Visual Basic.The function of the automatic angle detection by the software were evaluated to see whether it detected the angle of line.The subtraction function of DSA by the software was evaluated.(2) Clinical retrospective study:the untreated mask and target inages of 15 patients with motion along vertical axis during lateral cerebral DSA were uploaded to the software.The target images were processed with and without the software to get two sets of images.( 3 ) Evaluation:four experienced radiologists read and compared the two sets of the images,and graded their findings.Results ( 1 ) The automatic detection by the software suggested that the target images should be rotated counterclockwise 1.3°. The subtraction result of the software was satisfactory.(2)In the 15 sets of images,there were only three sets of images deemed optimal after traditional subtraction.After reverse rotation,artifacts were significantly reduced and the image sharper. There were ten cases with significant artifacts after traditional subtraction,and those images were sharper and showed more peripheral vessels after reverse rotation. The traditional subtraction images of two sets could not be interpreted,the reverse rotation registration images reached the diagnostic quality.(3)Subjective evaluation: there were more information and less noise and distortion in the registration images with reverse rotation than in the traditional subtraction. But the image resolution decreased slightly after reverse rotation registration.Conclusion The registration of digital angiography with reverse rotation can improve the image quality in lateral cerebral DSA.