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目的探讨主动脉夹层的螺旋CT、DSA、MRI影像学特点,并进行对比分析。方法21例患者,男16例、女5例,年龄44-73岁,平均54.5岁。全部患者均做CT平扫、增强扫描,DSA造影6例,MRI检查5例。结果按Debakey分型,I型5例,Ⅲ型16例,CT平扫主动脉内膜钙化内移者9例,增强后呈不同或等密度真假两腔,均显示内膜片,且扫描快,图像直观,不受金属植入物及病重的限制。DSA检查,发现主动脉破口及主动脉双腔4例(66.6%),MRI检查,均能精确显示主动脉夹层特有的双腔征,内膜撕裂的位置。结论螺旋CT对本病诊断率高,具有非创伤性且迅速方便的特点,较DSA、MRI诊断有明显的优势,应用范围更广,可作为主动脉夹层诊断的首选。
Objective To investigate the features of spiral CT, DSA and MRI in aortic dissection and compare them. Methods 21 patients, 16 males and 5 females, aged 44-73 years, mean 54.5 years old. All patients underwent CT scan, enhanced scan, DSA 6 cases, MRI 5 cases. Results According to the Debakey classification, there were 5 cases of type I and 16 cases of type III, and 9 cases of CT endometrial calcification in CT scan. Fast, intuitive image, free from metal implants and ill effects. In DSA examination, 4 cases (66.6%) of aortic aneurysm and double aortic cavity were found, and MRI examination showed that the aortic dissection-specific double-chamber sign and intimal tear were accurately located. Conclusion Spiral CT has the advantages of high diagnostic rate, non-invasive and quick and easy to diagnose. It has obvious advantages over DSA and MRI diagnosis and has a wide range of application. It can be used as the first choice for the diagnosis of aortic dissection.