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目的：探讨螺旋ＣＴ（ｓｐｉｒａｌＣＴ，ＳＣＴ）在腔内隔绝术（ＥＶＧＥ）治疗腹主动脉瘤（ＡＡＡ）术前评估中的价值。方法：以ＳＣＴ扫描了４１例ＡＡＡ患者，资料经计算机处理进行ＳＣＴ图像重建（ＣＴＡ），所用技术主要为表面阴影遮盖技术（ＳＳＤ）、最大信号强度投影（ＭＩＰ）、多平面重建（ＭＰＲ）及曲面重建（ＣＰＲ）技术，少数夹层动脉瘤应用模拟的内窥镜技术。测量远近端瘤颈长度及直径，瘤体的大小、形态及与分支动脉的关系，双髂动脉形态、口径及肾动脉开口到髂动脉分叉水平的自然长度。根据ＥＶＧＥ手术适应证的要求，选择９例患者行ＥＶＧＥ。结果：据上述参数选定移植物的规格、型号，经术中证实与需求相符。结论：ＣＴＡ图像质量高，无创、快速、准确，可获得ＥＶＧＥ术前评估所需全部参数，具有良好的应用价值
Objective: To investigate the value of spiral CT (SCT) in the preoperative evaluation of endovascular graft exclusion (EVGE) in the treatment of abdominal aortic aneurysm (AAA). Methods: Thirty - one patients with AAA were scanned by SCT. The data were processed by computer to reconstruct SCT images. The techniques used were surface shadow masking technique (SSD), maximum signal intensity projection (MIP), multiplanar reconstruction (MPR) Surface reconstruction (CPR) technology, a small number of dissecting aneurysm application of simulated endoscopic technology. The length and diameter of the neoplasm were measured, the size and shape of the tumor, the relationship with the branch artery, the shape and diameter of the iliac artery, and the natural length of the bifurcation between the opening of the renal artery and the iliac artery. According to the requirements of EVGE surgical indications, 9 patients were selected EVGE. Results: According to the parameters of the selected graft specifications, models, confirmed by surgery and demand. Conclusion: CTA images are of high quality, noninvasive, rapid and accurate, and can obtain all the parameters needed for preoperative evaluation of EVGE, which has good application value