应用容积重建成像三维CT血管造影方法诊断颅内动脉瘤

目的研究CT血管造影(CTA)及容积重建技术(VR)对颅内动脉瘤的临床应用价值。方法采用Siemens Plus 4 Somatom Volume Zoom型容积CT扫描机获得原始图像,采用容积重建成像技术(VR)进行三维重建,并辅助运用多轴面重建(MPR),共对45例动脉瘤患者进行了CTA检查,其中有25例同时行数字减影血管造影(DSA)检查,2l例行动脉瘤夹闭术治疗,3例行GDC栓塞术,其余保守治疗。结果共诊断45例动脉瘤患者,发现动脉瘤59个,其中小动脉瘤(≤5mm)32个。容积重建成像CTA清晰显示颅内动脉瘤、载瘤动脉、动脉瘤的形状和大小及其与邻近结构的解剖关系,在部分病例上要优于DSA。结论容积重建成像CTA是一种可靠、无创的快速诊断颅内动脉瘤的方法,为手术提供了详实的影像学资料,可帮助制定治疗方案：

Three-dimensional CT angiography with volume rendering for the detection of intracranial aneurysms

OBJECTIVE: To evaluate the value of three-dimensional CT angiography (3D-CTA) with volume rendering (VR) for the detection of intracranial aneurysm. METHODS: Axial CT images were obtained by helical CT scanning on 45 patients with intracranial aneurysms, 15 males and 30 females, aged 63.9 (33-79 years). The primitive data were entered into the Silicon Graphics O2 board to be treated. VR technique was adopted to reconstruct 3D-CTA imaging, aided by multiplanar reformation to obtain the total volume of aneurysm. Among the 45 patients 25 underwent DSA simultaneously, 21 underwent clamping of aneurysm, and 3 underwent GDC thrombosis. RESULTS: Fifty-nine intracranial aneurysms were detected in 45 patients by 3D-CTA, including 32 small aneurysms (< or = 5 mm). 3D-CTA with VR well demonstrated aneurysms and provided useful information including the site, shape, size and spatial relationship to the surrounding vessels and bony structures. CONCLUSION: A quick, reliable, and relatively noninvasive diagnostic tool for intracranial aneurysms, 3D-CTA with VR delineates the aneurysmal morphology in detail, and provides useful information for choosing and planning microsurgical or endovascular treatment.