16层螺旋CT 3D-MSCTA容积重建成像在颅内动脉瘤中的诊断及临床应用价值

目的:评价16层螺旋CT 3D-MSCTA容积重建(VR)技术在颅内动脉瘤中的诊断及临床应用价值。方法:对36例临床怀疑颅内动脉瘤的病人行3D-MSCTA检查,使用GE Light Speed pro 16层螺旋CT扫描仪获得原始图像,所有病例均采用VR技术对图像进行三维重建,同时采用最大密度投影(MIP)辅助检查。结果:在36例患者中3D-MSCTA发现动脉瘤39个(3例2个动脉瘤),其中大脑前动脉3个,前交通动脉11个,颈内动脉5个,大脑中动脉9个,后交通动脉9个,基底动脉环1个,椎动脉1个。VR图像上所测动脉瘤大小为1.1~14.7mm不等。DSA和手术证实20例共21个动脉瘤(1例为2个动脉瘤),VR所测动脉瘤大小与DSA比较无显著性差异(t=0.59,P>0.05)。VR所显示动脉瘤位置、大小、数量及是否为狭颈或宽底的结果与DSA基本相符。结论:3D-MSCTA VR对颅内动脉瘤显示清晰,可为手术或介入治疗动脉瘤提供非常有价值的信息,是一种快捷、经济和有效的检查技术。

The diagnostic and clinical application value of three dimensional CT angiography with volume reconstruction in intracranial aneurysms

Objective: To evaluate the diagnostic and clinical application value of 16-slice three dimensional CT angiography(3D-MSCTA) with volume reconstruction(VR) technique in intracranial aneurysms. Methods: 3D-MSCTA of 36 patients clinically suspected intracranial aneurysms were analysed restrospectively. Source images were got by GE Light Speed pro Scanner. The images of 36 patients were processed with VR and maximum intensity projection(MIP). Results: Thirty-nine intracranial aneurysms in 36 patients (3 patients had 2 aneurysms) were found by 3D-MSCTA, the location of aneurysms was in the anterior cerebral artery in 3, in the anterior communicating artery in 11, in the internal carotid artery in 5, in the middle cerebral artery in 9, in the posterior communicating artery in 9, in the cerebral basal arterial circle in 1, and in the vertebral artery in 1. DSA displayed 19 intracranial aneurysms in 18 patients(1 patient had 2 aneurysms), 2 aneurysms were verified by surgery in 2 patients. There was no significant difference between VR and DSA in size ranging of intracranial ameurysms(t=0.59, P>0.05). The position, size and width of the neck of intracranial aneurysms in 18 patients displayed by 3D-MSCTA were accordant with the results of DSA. Conclusion: 3D-MSCTA VR can display intracranial aneurysms clearly, and provide valuable information for surgery or interventional therapy. 3D-MSCTA VR is a very quick, economical and effective method in the diagnosis of intracranial aneurysms.