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KMID : 0311120090500020211
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Yonsei Medical Journal
2009 Volume.50 No. 2 p.211 ~ p.214
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Higher Lesion Detection by 3.0T MRI in Patient with Transient Global Amnesia
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Lee Seung-Yeob
Oh Seung-Hun
Kim Won-Joo
Lee Kyung-Yul
Suh Sang-Hyun
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Abstract
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Purpose: Transient global amnesia (TGA) patients were retrospectively reviewed to determine the usefulness of high-field strength MRI in detecting probable ischemic lesions in TGA.
Materials and Methods : We investigated the lesion detection rate in patients with TGA using 1.5T and 3.0T MRI. Acute probable ischemic lesions were defined as regions of high-signal intensity in diffusion weighted image with corresponding low-signal intensity in apparent diffusion coefficient map.
Results: 3.0T MRI showed 11 out of 32 patients with probable ischemic lesions in the hippocampus with mean lesion size of 2.8 ± 0.6 mm, whereas 1.5T MRI detected no lesion in any of 11 patients. There were no significant differences in clinical characteristics between the groups of 1.5 and 3.0T MRI.
Conclusion: High-field strength MRI has a higher detection rate of probable ischemic lesions than low-field strength MRI in patients with TGA.
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KEYWORD
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Transient global amnesia, ischemia, MRI
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