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目的探讨多层螺旋CT血管造影延迟时间对肺动脉栓塞的诊断价值。方法对60例临床疑似或诊断肺动脉栓塞的患者分三组采用不同的延迟扫描时间12 s、13 s1、4 s行对比剂增强扫描,在高分辨横轴位图像基础上,进行多平面重建(MPR)和最大密度投影(MIP),容积再现技术(VR),对主干、左右肺动脉、叶、段、段间的肺血管的显示进行分析和评价。结果三组60支主肺动脉、120支左、右肺动脉均显影良好,在最佳延迟时间12 s时叶、段、段间的肺血管的显示支数明显高于13 s和14 s的扫描结果,因此导致检出的肺栓塞血管支数与栓塞率存在较大差异。结论多层螺旋CT血管造影在预设的延迟时间内完成扫描,可直观地显示肺动脉各级分支,并对临床诊断有无肺动脉栓塞、病变范围和严重程度提供了准确的依据,可作为诊断肺动脉栓塞的重要指标。
Objective To investigate the diagnostic value of multi-slice spiral CT angiography in the diagnosis of pulmonary embolism. Methods Sixty patients with suspected or diagnosed pulmonary embolism were divided into three groups with contrast-enhanced scanning for 12 s, 13 s, and 4 s in different groups. The images were reconstructed on the basis of high resolution horizontal axis images MPR) and maximum density projection (MIP) and volume rendering techniques (VR) were performed to analyze and evaluate the display of pulmonary vessels in the trunk, left and right pulmonary arteries, leaves, segments and segments. Results Sixty main pulmonary arteries, 120 left and right pulmonary arteries were well developed in three groups. The number of pulmonary vessels in the segments of leaves, segments and segments at 12 s was significantly higher than that of 13 s and 14 s , Which led to the detection of pulmonary embolism with blood vessel count and embolization rate there is a big difference. Conclusions Multi-slice spiral CT angiography is completed within the preset delay time, which can directly show the branches of pulmonary arteries and provide an accurate basis for the clinical diagnosis of pulmonary embolism, the extent and severity of the lesion, which can be used as a diagnostic tool for pulmonary arteries Embolism of the important indicators.