Evaluation of traumatic subarachnoid hemorrhage using susceptibility-weighted imaging.
Evaluation of traumatic subarachnoid hemorrhage using susceptibility-weighted imaging.
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DOI：
10.3174/ajnr.a2022
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发表时间：
2010-08
期刊：
影响因子：
--
通讯作者：
Haacke EM
中科院分区：
文献类型：
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作者：
Wu Z;Li S;Lei J;An D;Haacke EM
SWI是一种对出血非常敏感的磁共振成像技术。我们的目标是比较SWI和CT，以确定SWI是否能显示蛛网膜下腔不同部位的创伤性蛛网膜下腔出血。对20例经CT确诊为蛛网膜下腔出血的急性颅脑损伤患者进行了磁共振成像扫描。两位神经放射科医生分析了CT和SWI数据，以确定蛛网膜下腔的8个解剖部位是否存在蛛网膜下腔出血。CT和SWI均确定了55个SAH区域。10个区域仅通过CT识别，13个区域仅通过SWI识别。在SWI上，SAH的信号很暗，周围环绕着脑沟或脑池内的脑脊液信号。与表面光滑的静脉相比，SAH的边界较粗糙，信号强度较不均匀。在许多情况下，脑沟内的血液留下了一个呈“三角形”的信号强度损失区域。SWI显示的脑室出血比CT多5例。SWI可以通过其信号强度和独特的形态识别SAH。SWI可以为CT提供少量SAH和脑室内出血的补充信息。
SWI is an MR imaging technique that is very sensitive to hemorrhage. Our goal was to compare SWI and CT to determine if SWI can show traumatic SAH in different parts of the subarachnoid space. Twenty acute TBI patients identified by CT with SAH underwent MR imaging scans. Two neuroradiologists analyzed the CT and SWI data to decide whether there were SAHs in 8 anatomical parts of the subarachnoid space. Fifty-five areas with SAH were identified by both CT and SWI. Ten areas were identified by CT only and 13 by SWI only. SAH was recognized on SWI by its very dark signal intensity surrounded by CSF signal intensity in the sulci or cisterns. Compared with the smooth-looking veins, SAH tended to have a rough boundary and inhomogeneous signal intensity. In many instances, blood in the sulcus left an area of signal intensity loss that had a “triangle” shape. SWI showed 5 more cases of intraventricular hemorrhage than did CT. SAH can be recognized by SWI through its signal intensity and unique morphology. SWI can provide complementary information to CT in terms of small amounts of SAH and hemorrhage inside the ventricles.