CAJ | 학술논문

目的:评价追踪触发技术CTA在颅内动脉瘤中的临床应用价值.方法:70例自发性蛛网膜下腔出血患者行M SCTA和DSA检查.GE lightspeed 16采集原始数据,应用Smart Prep选件,监测颈总动脉分叉水平下一层面颈总动脉的密度,CT值达85Hu时启动扫描,注射速率为3.5ml/s.采用容积显示(VR)、最大密度投影(MIP)和CT仿真内镜三种后处理技术.所得图像分别由3位放射科医生和2位神经外科医生评价,分析其部位、大小、形状以及与周围结构的关系.结果:70例患者中,58例患者共发现65个动脉瘤,漏诊2个动脉瘤.前交通动脉19例,大脑中动脉12例,大脑前动脉10例,颈内动脉海绵窦段16例,基底动脉6例,小脑上动脉1例,小脑下后动脉1例.瘤体直径平均约6.88 mm,最大14.3mm,最小2.0mm,与DSA测量结果经t检验无显著性差异.3D图像显示瘤体、瘤颈和载瘤动脉与周围血管及颅骨的关系清晰、确切.结论:3D-MSCTA可方便、敏感检出颅内动脉瘤,采用追踪触发扫描技术有助于提高图像质量.
목적:평개추종촉발기술CTA재로내동맥류중적림상응용개치.방법:70례자발성주망막하강출혈환자행M SCTA화DSA검사.GE lightspeed 16채집원시수거,응용Smart Prep선건,감측경총동맥분차수평하일층면경총동맥적밀도,CT치체85Hu시계동소묘,주사속솔위3.5ml/s.채용용적현시(VR)、최대밀도투영(MIP)화CT방진내경삼충후처리기술.소득도상분별유3위방사과의생화2위신경외과의생평개,분석기부위、대소、형상이급여주위결구적관계.결과:70례환자중,58례환자공발현65개동맥류,루진2개동맥류.전교통동맥19례,대뇌중동맥12례,대뇌전동맥10례,경내동맥해면두단16례,기저동맥6례,소뇌상동맥1례,소뇌하후동맥1례.류체직경평균약6.88 mm,최대14.3mm,최소2.0mm,여DSA측량결과경t검험무현저성차이.3D도상현시류체、류경화재류동맥여주위혈관급로골적관계청석、학절.결론:3D-MSCTA가방편、민감검출로내동맥류,채용추종촉발소묘기술유조우제고도상질량.
Purpose: To evaluate the clinical value of the bolus - triggered technique of MSCTA in the diagnosis of intracranial artery aneurysm. Methods: We studied 70 patients with none - traumatic SAH. All these patients received 3D - MSCTA and digital subtraction angiography(DSA). The raw CT data were acquired by GE lightspeed 16. Smart Prep was used to monitor the carotid artery density. The threshold of 85 Hu and injection rate of 3.5ml/ s was used. Source images were processed by volume rendering, maximal intensity projection and fly - through on a AW4.2 workstation. The location, size, and shape of aneurysms and their relationship with adjacent tissues were analyzed by 3 radiologists and 2 neurosur-geons. Results: Sixty - five aneurysms were detected in 58 of the 70 patients, 2 aneurysms were missed. The maximum aneurysm diameter ranged from 2.0mm to 14.3mm, 6.88mm on average. There was no statistically significant difference between the aneurysm diameter on CT and DSA by t - test. The 3D virtual images produced on the workstation were clear and vivid, and the location and size of the a-neurysm and its relations to the parent artery and skull can be revealed directly. Conclusion: The 3D -CTA is convenient and reliable in diagnosing intracranial aneurysms. The bolus - triggered technique can be used to improve the image quality.