目的 旨在探讨64层螺旋CT后 处理技术在冠状动脉支架植入术后复查 中的应用价值。方法 选取我院2016年6 月-2017年11月行冠状动脉支架植入术后 回院复查患者37例，均进行了CT冠状动脉 成像检查，收集患者影像学资料，观察患 者支架、支架血管及非支架血管的通畅程 度，分析螺旋CT后处理技术在冠状动脉支 架植入术后复查中的应用价值。结果 共 56个支架，51个(91.07%)支架通畅，CT平 扫图像显示支架内密度均匀，增强扫描 后冠状动脉血管密度与支架内密度相一 致，支架近段未见狭窄情况，支架远端图 像表现正常。多数前降支血管CPR图像显 示近段见金属支架影，管腔通畅，4例患 者合并钙化斑块影；3个支架出现狭窄或 闭塞，CT平扫可见支架内见低密度影， CPR图像与血管横断面图像显示，管腔狭 窄率约30%-70%，增强扫描中1个支架内未 见造影剂影，于毗邻出见纤细侧枝循环血 管影。CPR图像在27支血管中，显示支架 前软斑块10个，局部管腔无明显狭窄，中 段见钙化斑块；硬斑块5个，混合性斑块 3个，远端软斑块5个，硬斑块2个，混合 性斑块2个。心脏VR图像及心脏VR tree图 像均可明显显示患者冠脉血管见金属支架 影，发现37例患者中，21支血管出现非支 架血管狭窄，其中单支血管13例，双支血 管8例。结论 64层螺旋CT后处理技术可直 观、立体显示冠状动脉内支架是否再次发 生狭窄情况，能作为冠状动脉支架植入术 后复查的主要检查手段。

Objective To explore the value of 64-slice spiral CT post-processing technique in the reexamination after coronary stent implantation. Methods A total of 37 cases of patients who accepted reexamination after coronary artery stent implantation in our hospital from June 2016 to November 2017 were selected. All of the patients were checked by CT coronary artery scan, and their imaging data were collected. After the observation of their patency in stents, stents blood vessels, and non - vascular stent spiral, the analysis of application value of CT post-processing technique in the reexmination of coronary artery stent implantation were represented. Results According to the CT scan image among 56 stents, 51 (91.07%) stent gained patency, and uniform densit. After enhancement of scanning, coronary artery vascular density is consistent with the density of the stent, and stent stenosis was not seen at the near end, and the end of stent appeared normal. Most CPR images of the anterior descending vascular showed metal stent shadow in the near segment and patency in blood vessels, with unobstructed lumen and calcified plaque shadow in 4 patients. Three stents appeared stenosis or occlusion. CT scan was visible inside to see low density shadow, and the CPR images and vascular cross-sectional images showed that luminal stenosis rate is about 30%-30%. No contrast agent in the enhancement scanning was seen in a stent, adjacent to which slender vessels collateral circulation was observed. CPR images in 27 vessels showed 10 soft plaques in front of the stent, no obvious stenosis in the local lumen, and calcified plaques in the middle segment. There were 5 hard plaques, 3 mixed plaques, 5 soft plaques, 2 hard plaques and 2 mixed plaques. Heart VR images and heart VR tree images can clearly show that patients with coronary blood vessels had metalic stents. In 37 found cases, 21 of the blood vessels were appeared in the vascular stenosis stent, including 13 cases of single blood vessels, 8 cases of double vessels. Conclusion 64-spiral CT post-processing technique can be intuitively, three-dimensional display of coronary artery stent to show whether the stenosis happened again, it can also be used as a main approach for reexmination after coronary artery stent implantation.