Ebisu T, Tanaka C, Umeda M, Kitamura M, Fukunaga M, Aoki I, Sato H, Higuchi T, Naruse S, Horikawa Y, Ueda S
Department of Neurosurgery, Meiji College of Oriental Medicine, Funai-gun, Kyoto, Japan.
Radiology. 1997 Jun;203(3):823-8. doi: 10.1148/radiology.203.3.9169711.
To determine if diffusion- and T2-weighted echo-planar magnetic resonance (MR) imaging can be used to detect acute hemorrhagic stroke and to differentiate hemorrhagic from nonhemorrhagic stroke.
A total of 118 examinations (diffusion- and T2-weighted MR imaging) in 19 patients with 27 nonhemorrhagic strokes and in six patients with seven hemorrhagic strokes were performed. The ratios of apparent diffusion coefficient and of signal intensity on T2-weighted MR images in lesions to those in contralateral control areas were calculated.
Decreased ADC was shown in lesions of acute (0-3 days) hemorrhagic stroke, as well as in lesions of acute nonhemorrhagic stroke. Hypointense areas were seen on T2-weighted MR images in patients with acute hemorrhagic stroke, in contrast to normal to increased signal intensity in those with acute nonhemorrhagic stroke. Apparent diffusion coefficient tended to remain decreased in hemorrhagic stroke lesions even 100 days after onset, in contrast to the increased coefficient in nonhemorrhagic stroke lesions at the late chronic stage (31 days or older).
Diffusion- and T2-weighted echo-planar MR imaging can be used to detect and distinguish between acute hemorrhagic and nonhemorrhagic stroke.
确定扩散加权和T2加权回波平面磁共振成像（MRI）是否可用于检测急性出血性卒中，并区分出血性卒中和非出血性卒中。
对19例患有27处非出血性卒中和6例患有7处出血性卒中的患者进行了总共118次检查（扩散加权和T2加权MRI）。计算病变区域在T2加权MRI图像上的表观扩散系数和信号强度与对侧对照区域的比值。
急性（0 - 3天）出血性卒中和急性非出血性卒中的病变区域均显示表观扩散系数降低。急性出血性卒中患者的T2加权MRI图像上可见低信号区，而急性非出血性卒中患者的信号强度正常或增加。与非出血性卒中病变在慢性晚期（31天或更久）系数增加相反，出血性卒中病变的表观扩散系数即使在发病100天后仍倾向于保持降低。
扩散加权和T2加权回波平面MRI可用于检测和区分急性出血性卒中和非出血性卒中。
