头颈部双能量去骨计算机断层摄影血管造影对颅内动脉瘤的诊断

  目的  研究头颈部双能量去骨计算机断层摄影血管造影(dual energy bone removal computed tomography angiography, DEBR CTA)诊断颅内动脉瘤的准确性, 以数字减影血管造影(digital subtraction angiography, DSA)及三维旋转数字减影血管造影(three-dimensional rotational digital subtraction angiography, 3DRA)为金标准。  方法  回顾性分析本院8例怀疑颅内动脉瘤且均行双能量头颈部CTA、DSA及3DRA的患者。根据载瘤血管位置将颅内动脉分为16个区域, 逐一观察动脉瘤存在情况, 测量动脉瘤各种径线长度, 比较其与DSA/3DRA的一致性。根据动脉瘤最大径分为4组:无, < 3 mm, 3~5 mm, ≥ 5 mm; 分别评价DEBR CTA对动脉瘤大小的评价效果。  结果  8例患者DEBR CTA共发现9个动脉瘤, 全部经过DSA证实。DSA/3DRA及DEBR CTA测量的最大径线分别为(5.2±5.1)和(5.7±5.6)mm, 配对t检验无统计学意义。2例后交通动脉起始处动脉瘤的2条远端供血动脉未被DEBR CTA显示。DEBR CTA评价≥ 5 mm动脉瘤最大径的准确性达100%;1例DEBR CTA评价为 < 3 mm的动脉瘤, DSA/3DRA评价为3~5 mm。  结论  DEBR CTA能有效诊断颅内动脉瘤, 与DSA/3DRA具有较高的一致性。DEBR CTA可能会漏诊接近颅底动脉瘤的远端细小供血动脉并且低估接近颅底的小动脉瘤的大小。

Head and Neck Dual Energy Bone Removal Computed Tomography Angiography Using the Intracranial Aneurysms

Objective To evaluate the diagnostic accuracy of dual energy bone removal CT angiography (DEBR CTA)in the detection of intracranial aneurysms, compared with the findings of digital subtraction angiography (DSA) and three-dimensional rotational digital subtraction angiography (3DRA). Methods Eight patiens with suspected intracranial aneurysms underwent dual energy CTA, DSA, and 3DRA. The intracranial arteries were divided into 16 areas according to the locations of tumor-carrying arteries. Aneurysms detected...