摘要
目的探讨一种快速有效的自动去骨技术——数字减影CT血管造影术(DSCTA)在颅内动脉瘤中的临床应用。方法对27例临床怀疑颅内动脉瘤患者按照DSCTA的扫描方法采集数据。即制定两组扫描参数相同的计划螺旋采集平扫与增强扫描。然后用增强数据逐层减去平扫数据,自动去除骨与脑组织,只剩下血管影像。由两位放射医师分别在工作站上行常规与减影的容积再现(VR),最大密度投影(MIP)和多平面重组(MPR)方法分析颅内血管。全部病例均行DSA检查。最后用四分法(4分很好;3分好;2分;可以接受;1分差)来评价DSCTA图像质量。结果27例患者中,DSA发现38个动脉瘤,DSCTA发现38个动脉瘤,常规CTA发现36个动脉瘤。DSCTA图像质量分析4分,6例(22.2%),3分,15例,(55.6%),2分,6例(22.2%);没有一例图像质量评为差或不能诊断。结论DSCTA能快速准确的自动去骨,更清晰显示颅内血管,特别是提高了颅底段血管的显示。
Objective To investigate a fast and effective utility of digital subtraction CT angiography （DSCTA） for the detection of intracranial aneurysms. Methods Twenty-seven cases suspected to be intracranial aneurysms were examined by DSCTA. Two same scan protocols were prepared： unenhanced helical and enhanced CTA. Then, the CTA data subtract unenhanced data section-by-section removing bone and brain tissue, just vascular structures remain visible. Volume rendering （VR）, maximum intensity projection （MIP） and multiplanar reformation （MPR） were used to analyze intracranial vessels on the graphics workstation by two radiologists. DSA was performed in all patients. The image quality of DSCTA was evaluated with a four-point scale （4： excellent; 3： good quality; 2： acceptable; 1： poor quality）. Results In our study, 38 aneurysms were detected by DSA and DSCTA. 36 aneurysms were detected by conventional CTA. The image quality of DSCTA： 6 cases （22.2%） were rated 4; 15 cases （55.6%） were rated 3; 6 cases （22.2%） were rated 2. None of poor or no-diagnostic image quality were found. Conclusion DSCTA allows fast and effective elimination of bony structures, thus improving the visualization of arteries at the level of the skull base.
出处
《中国医学影像技术》
CSCD
北大核心
2007年第3期450-452,共3页
Chinese Journal of Medical Imaging Technology
作者简介
张志伟（1982-）,男,四川成都人,学士,技师.E-mail： zhiweizh1314@163.com
[通讯作者]吕发金,重庆医科大学附属第一医院放射科,400016.E-mail： fajinlv@163.com
