CT and conventional and diffusion-weighted MR imaging in acute stroke: Study in 691 patients at presentation to the emergency department
CT and conventional and diffusion-weighted MR imaging in acute stroke: Study in 691 patients at presentation to the emergency department
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DOI：
10.1148/radiol.2242010873
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发表时间：
2002-08-01
期刊：
影响因子：
19.7
通讯作者：
Gonzalez, RG
中科院分区：
文献类型：
--
作者：
Mullins, ME;Schaefer, PW;Gonzalez, RG
目的：比较计算机断层扫描(CT)和磁共振成像(MR)在连续一系列急诊就诊的急性卒中患者中的诊断准确性。材料和方法：分析691例疑似急性卒中患者的临床资料和影像。结果：573例患者均行头颅CT扫描，其敏感性为42%(95%CI：37%，46%)，特异性为91%(95%CI：82%，96%)。173例患者复查CT，其敏感性为77%(95%CI：70%，84%)，特异性为79%(95%CI：49%，95%)。498个MR图像中，DW图像411个，敏感性94%(95%CI：1%，96%)，特异性97%(95%CI：88%，100%)；常规MR图像87个，敏感性70%(95%CI：58%，81%)，特异性94%(95%CI：70%，100%)。通过在早期使用DW磁共振成像(
PURPOSE: To compare the diagnostic accuracy of computed tomography (CT) and magnetic resonance (MR) imaging in a consecutive series of patients at presentation to the emergency department with symptoms of acute stroke.MATERIALS AND METHODS: Clinical data and images obtained in 691 consecutive patients with suspected acute stroke were examined. Results of first and second head CT and brain diffusion-weighted (DW) and conventional MR imaging were compared with each other and with the final neurologic discharge diagnosis.RESULTS: Five hundred seventy-three patients underwent CT at presentation, with 42% sensitivity (95% CI: 37%, 46%) and 91% specificity (95% CI: 82%, 96%). A total of 173 patients underwent a second CT examination, with 77% sensitivity (95% CI: 70%, 84%) and 79% specificity (95% CI: 49%, 95%). Of 498 MR images, 411 were DW, with 94% sensitivity (95% CI: 1%, 96%) and 97% specificity (95% CI: 88%, 100%), and 87 were conventional, with 70% sensitivity (95% CI: 58%, 81%) and 94% specificity (95% CI: 70%, 100%). By using DW MR imaging in the early period (