Detection of intracranial aneurysms with multislice CT: comparison with conventional angiography
Detection of intracranial aneurysms with multislice CT: comparison with conventional angiography
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DOI：
10.1007/s00234-003-1155-1
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发表时间：
2004-06-01
期刊：
影响因子：
2.8
通讯作者：
Thron, A
中科院分区：
文献类型：
--
作者：
Dammert, S;Krings, T;Thron, A
我们评估多层螺旋CT对蛛网膜下腔或颅内出血患者颅内动脉瘤的诊断准确性。我们对50例连续出现蛛网膜下腔（SAH）和/或颅内出血的患者进行多层螺旋CT和多平面数字减影血管造影（DSA）成像，并由三名神经放射科医生检查动脉瘤的数量、大小和位置。采用多平面重新格式化（MPR）、最大强度投影（MIP）、表面阴影显示（SSD）和体绘制（VRT）对CT数据进行评估。41例患者经常规血管造影发现51个动脉瘤。CT血管造影（CTA）显示39例患者中有48个动脉瘤，取决于观察者。多层螺旋CT对小动脉瘤（< 4 mm）的总体敏感性为83.3%，对中动脉瘤（5-12 mm）的总体敏感性为90.6%，对大动脉瘤（bb0 - 13 mm）的总体敏感性为100%。多层CTA对中、大型颅内动脉瘤的敏感性在螺旋单层CT报道的范围的上半部分。然而，由于小动脉瘤可能无法被发现，DSA仍然是检查SAH的标准技术。
We assessed the diagnostic accuracy of multislice CT in detection of intracranial aneurysms in patients presenting with subarachnoid or intracranial haemorrhage. Multislice CT and multiplanar digital subtraction angiography (DSA) images were obtained in 50 consecutive patients presenting with subarachnoid (SAH) and/or intracranial haemorrhage and reviewed by three neuroradiologists for the number, size and site of any aneurysms. The CT data were assessed using multiplanar reformats (MPR), maximum-intensity projections (MIP), surface-shaded display (SSD) and volume-rendering (VRT). In conventional angiography 51 aneurysms were detected in 41 patients. CT angiography (CTA) showed up to 48 aneurysms in 39 patients, depending on the observer. The overall sensitivity of multislice CT was 83.3% for small (< 4 mm), 90.6% for medium-size (5-12 mm) and 100% for large (> 13 mm) aneurysms. The sensitivity of multislice CTA to medium-size and large intracranial aneurysm is within the upper part of the range reported for helical single-slice CT. However, as small aneurysms may not be found, DSA remains the standard technique for investigation of SAH.