16层螺旋CT血管成像在颅内动脉瘤诊断中的价值

目的:探讨16层螺旋CT血管成像(CTA)在颅内动脉瘤诊断中的价值.方法:对临床疑诊为颅内动脉瘤16例患者行CTA检查,其中8例同期行数字减影血管造影(DSA)检查.原始图像重建采用最大密度投影(MIP)和容积再现技术(VR).结果:16例患者经CTA检出动脉瘤17个.1例患者为多发动脉瘤(2个),15例为单发动脉瘤.瘤体以圆形或卵圆形居多(13个),也可以显示为肾形(2个)、葫芦形(1个)和串蛛状(1个).瘤体最大直径18 mm,最小直径1.5 mm.8例行DSA检查的患者中,7例DSA所见与CTA结果一致,1例DSA漏诊1个动脉瘤.结论:16层CTA检出动脉瘤准确率高,快速、无创,可以作为诊断动脉瘤首选影像学方法,尤其适合于急诊情况下,并能补充DSA诊断信息.

Diagnostic Value of 16-Slice Spiral CT Angiography for Intracranial Aneurysm

Objective:To evaluvate the 16-slice spiral CT angiography (CTA) in the diagnosis of intracranial aneurysm.Methods:16 patients with clinically suspected intracranial aneurysm were evaluated by 16-slice spiral CTA,8 cases underwent digital subtraction angiography (DSA) simultaneously.Maximal intensity projection (MPR) and volume rendering (VR) images were obtained by reconstruction. Results:Of the 16 patients,17 aneurysms were detected by CTA.One patient had multiple (n=2) and the others had solitary aneurysm.The aneurysms were mainly round or oval in shape (n=15),the others were bean shape (n=2),rosary shape and gourd shape for one case each.The largest one was 18mm and the smallest one was 1.5mm in diameter.Of the 8 patients having DSA,the DSA findings were the same as that of CTA in 7 patients;in one patient,the aneurysm was missed by DSA.Conclusion:16-slice spiral CT angiography is an accurate,rapid and noninvasive method for detecting intracranial aneurysm,especially in the emergency situation,some additional important information can be provided for DSA.