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目的探讨64层螺旋CT神经血管成像的准确性及影响因素。方法回顾总结40例患者的头颈部CTA影像资料,其中正常26例,异常14例。分析CTA成像过程中阵列参数设置,重建方法选择对CTA成像的影响。结果阵列参数设置不当产生伪影或血管假狭窄5例,最大密度投影层块厚度选取不当导致血管细节显示不佳12例,通过调节参数并结合多种CTA显示方法,CTA成像准确率为100%,定性准确率为85%。结论部分重叠采集数据,灵活应用重建方法,回顾性阅读轴位图像将可提高CTA成像的准确性。
Objective To explore the accuracy and influencing factors of 64-slice spiral CT angiography. Methods The head and neck CTA images of 40 patients were retrospectively reviewed. Among them, 26 were normal and 14 were abnormal. To analyze the influence of array parameter setting and reconstruction method selection on CTA imaging in CTA imaging. Results In 5 cases with artifact or vessel pseudo-stenosis caused by improper array parameters, 12 cases showed poor vascular details due to improper thickness of maximum density projection layer. The accuracy of CTA imaging was 100% by adjusting parameters and combining with multiple CTA display methods. , Qualitative rate of 85%. Conclusions The partial overlap of data collection, flexible application of reconstruction methods, retrospective reading of axial images will improve the accuracy of CTA imaging.