目的 评估数字减影血管造影（DSA）与多层螺旋计算机断层扫描（CT）在诊断主动脉夹层中的效果与价值。方法 选取2022年5月至2024年11月本院64例疑似主动脉夹层的患者,所有患者均接受DSA与CT检查。通过对比两种影像学检查结果,分析各自的诊断效能。结果 CT的诊断阳性率为85.94%（55/64）,漏诊率为1.56%（1/64）,敏感度与特异度分别为98.21%和100%,与DSA的诊断结果无统计学意义（P>0.05）。CT组内膜破口、内膜瓣、真假双腔及受累支数分别为99（99.00%）、36（97.30%）、37（100.00%）和91（98.91%）,与DSA检出的情况相符（P>0.05）。CT测得的第一破口尺寸、破口至LSA的距离和真腔远端直径分别为（16.54±1.69）mm、（19.12±2.44）mm、（27.92±2.26）mm,均与DSA测量结果相近（P>0.05）。结论 多层螺旋CT在主动脉夹层的诊断中具有较高的准确性,其诊断结果与DSA相当,且CT具有无创、可重复、操作便捷及较高患者接受度等优点。

Objective To evaluate the efficacy and value of digital subtraction angiography (DSA) and multi-slice spiral computed tomography (CT) in the diagnosis of aortic dissection. Methods Sixty-four patients with suspected aortic coarctation were selected from May 2022 to November 2024 in our hospital, and all of them were examined by DSA and CT. The diagnostic efficacy of each was analyzed by comparing the results of the two imaging tests. Results The positive rate of CT diagnosis was 85.94% (55/64), the missed diagnosis rate was 1.56% (1/64), the sensitivity and specificity were 98.21% and 100%, respectively, and there was no significant difference compared with the diagnostic results of DSA (P>0.05). The CT group had 99 (99.00%), 36 (97.30%), 37 (100.00%), and 91 (98.91%) endometrial rupture, intimal flap, true and false double lumen, and affected branches, respectively, which were consistent with the findings detected by DSA (P>0.05). The first incision size, distance from incision to LSA, and distal diameter of the true lumen measured by CT were (16.54 ± 1.69) mm, (19.12 ± 2.44) mm, and (27.92 ± 2.26) mm, respectively, which were similar to the DSA measurement results (P>0.05). Conclusions Multi slice spiral CT has high accuracy in the diagnosis of aortic dissection, and its diagnostic results are comparable to DSA. CT has the advantages of non invasiveness, reproducibility, convenient operation, and high patient acceptance