Subacute and chronic subarachnoid hemorrhage: Diagnosis with fluid-attenuated inversion-recovery MR imaging
Subacute and chronic subarachnoid hemorrhage: Diagnosis with fluid-attenuated inversion-recovery MR imaging
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DOI：
10.1148/radiology.203.1.9122404
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发表时间：
1997-04-01
期刊：
影响因子：
19.7
通讯作者：
Uemura, K
中科院分区：
文献类型：
--
作者：
Noguchi, K;Ogawa, T;Uemura, K
目得：评估液体衰减反转恢复（FLAIR）磁共振（MR）成像在亚急性和慢性蛛网膜下腔出血检测中的作用。材料和方法：作者在发病后3-45天对14名成人蛛网膜下腔出血患者进行了19次0.5 T FLAIR MR成像检查，并对22名成人对照受试者进行了22次FLAIR检查。将FLAIR图像对亚急性和慢性蛛网膜下腔出血的检测与常规自旋回波MR和计算机断层扫描（CT）图像的检测进行比较。在检测亚急性蛛网膜下腔出血时，FLAIR（100%检出）明显优于T1加权成像（上级T2加权成像（0%检出，P <0.02）和CT（45%检出，P <0.02 [Fisher精确检验]）。尽管FLAIR成像（63%的检出率）在慢性蛛网膜下腔出血的检出方面具有上级优势，但两种方式之间无统计学显著差异。FLAIR成像显示所有蛛网膜下腔出血区域在发作后18天内为高信号区，最长可达45天。在盲法比较中，没有FLAIR图像在对照组中获得混淆与patients.CONCLUSION：FLAIR诊断图像是上级常规MR或CT图像在亚急性蛛网膜下腔出血患者。
PURPOSE: To evaluate fluid-attenuated inversion-recovery (FLAIR) magnetic resonance (MR) imaging in the detection of subacute and chronic subarachnoid hemorrhage.MATERIALS AND METHODS: The authors performed 19 FLAIR MR imaging examinations at 0.5 T in 14 adult patients with subarachnoid hemorrhage 3-45 days after the ictus and 22 FLAIR examinations in 22 adult control subjects. The detection of subacute and chronic subarachnoid hemorrhage on FLAIR images was compared with the detection on conventional spin-echo MR and computed tomographic (CT) images.RESULTS: In the detection of subacute subarachnoid hemorrhage, FLAIR (100% detection) was significantly superior to T1-weighted imaging (36% detection, P < .01), T2-weighted imaging (0% detection, P < .02), and CT (45% detection, P < .02 [Fisher exact test]). Although FLAIR imaging (63% detection) was superior in chronic subarachnoid hemorrhage detection, there were no statistically significant differences between modalities. FLAIR imaging demonstrated all subarachnoid hemorrhage areas as high-signal-intensity areas within 18 days and up to a maximum of 45 days after the ictus. In a blind comparison, no FLAIR images acquired in control subjects were confused with those acquired in patients.CONCLUSION: FLAIR diagnostic images are superior to conventional MR or CT images in patients with subacute subarachnoid hemorrhage.