脳卒中
Online ISSN : 1883-1923
Print ISSN : 0912-0726
ISSN-L : 0912-0726
総説
脳卒中CT診断の最先端
木下 俊文篠原 祐樹木下富美子高橋 規之
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ジャーナル フリー

2009 年 31 巻 6 号 p. 472-476

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The early CT findings of cerebral infarction include an obscuration of the lentiform nucleus, slight decrease in tissue attenuation, and effacement of the cortical sulci. Dense middle cerebral artery (MCA) sign is an early marker of thromboembolic occlusion of MCA. A novel adaptive partial median filter can improve detection of slightly hypoattenuated areas. Z-score mapping based on a voxel-by-voxel analysis can also help evaluate hypoattenuation areas. Perfusion CT can provide information about brain perfusion, which permits differentiation between ischemic penumbra and irreversibly damaged brain tissue. CT angiography can help detect occlusive or severely stenosed vessels, with collateral pathway via leptomeningeal anastomosis. Potential usefulness of 320-row detector CT in evaluating ischemic cerebrovascular disease is also described.

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© 2009 日本脳卒中学会
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