256层螺旋CT两种去骨技术在脑血管成像中的对比研究  

Comparision of Two Bone-subtracted Technology of 256-slice Spiral CT Image Quality in Cerebral Vascular Imaging

作　　者：黄挺[1] 尹伟[1] 陆涛 张叶 王铁功[1] 王敏杰[1] 

机构地区：[1]第二军医大学附属长海医院影像医学科,上海200433

出　　处：《中国CT和MRI杂志》2017年第11期63-66,共4页Chinese Journal of CT and MRI

摘　　要：目的分析比较自动去骨技术与减影去骨技术在256层螺旋CT脑血管成像中图像质量的差异。方法回顾性分析47例脑血管疾病(如钙化、动脉瘤)患者资料,所有脑血管成像序列根据不同的去骨后处理方法分为对照组和观察组,对照组采用自动去骨成像技术,观察组采用减影去骨成像技术,对去骨后的CTA图像进行质量评估。比较两种去骨技术的成功率(是否影响诊断)。2名观察者对各组图像质量主观评分的一致性采用Kappa检验,采用独立样本t检验比较两组图像主观评分。结果对照组与观察组组去骨的成功率分别为70.21%(33/47)和93.62%(44/47)。两位观察者的相关系数为0.914,观察组图像质量明显高于对照组图像,两组图像质量有统计学差异(评分为(2.76±0.84)vs(3.68±0.73),t=-5.978,P<0.05)。结论在颅内虹吸段血管有钙化情况下,减影去骨技术较自动去骨技术可显著提高诊断的准确性,在临床怀疑小动脉瘤时,采用减影去骨技术,可降低漏诊率。Objective To compare the difference of automatic boneless and subtraction boneless technologyin cerebral vascular image of 256-slice spiral CT image quality.Methods Retrospective analysis cerebrovascular disease（such as calcification, aneurysm） clinical data of 47 patients. According to the different way of post-processing method, all cerebral images divided into control group and observationgroup.control group underwent automatic boneless technology, the observation group received subtraction boneless technology, difference comparison of image quality between two groups of cerebral angiography. To compare the successive rates of the two methods. Two observers of the subjective image quality score using Kappa consistency test, image subjective ratings Comparison between two groups was done with independent sample T-test. ResultsThe control group and observation group boneless success rate was 70.21% （33/47） and 93.62% （44/47）. The correlation coefficient of two observers was 0.914, Image quahty of observation group was significantly higher than the control group in the image, the image quality was statistically difference between the two groups （2.76 ± 0.84） vs （3.68 ± 0.73）, t=5.978, P〈0.05）.ConclusionIn intracranial vascular siphon segment with calcification, subtraction boneless technology can significantly improve the accuracy of diagnosis, the clinical suspicion small aneurysms or assess artery stenosis degree, boneless technology, adopt subtraction angiography can reduce missed diagnosis and reduce the narrow exaggerated effect. Clinically suspected small aneurysms subtraction boneless technology can reduce missed diagnosis and reduce the narrow exaggerated effect.

关 键 词：脑卒中 CTA 一键去骨技术 蒙片减影技术 

分 类 号：R743[医药卫生—神经病学与精神病学]