MR imaging in acute stroke: diffusion-weighted and perfusion imaging parameters for predicting infarct size.
作者： Hans-Jörg Wittsack , Afra Ritzl , Gereon R. Fink , Frank Wenserski , Mario Siebler
DOI: 10.1148/RADIOL.2222001731
关键词: Predictive value of tests 、 Magnetic resonance imaging 、 Ischemia 、 Perfusion 、 Central nervous system disease 、 Nuclear medicine 、 Stroke 、 Lesion 、 Perfusion scanning 、 Medicine
摘要: PURPOSE: To investigate the predictive value of ischemic lesion size, as depicted in acute stroke phase on diffusion-weighted magnetic resonance (MR) images and time-to-peak (TTP) maps tissue perfusion imaging, for infarct derived from T2-weighted imaging postacute phase. MATERIALS AND METHODS: Fifty patients who underwent within 1–24 hours after onset a follow-up investigation about 8 days were included. Lesion volumes evaluated by using semiautomatic thresholding technique. Volumetric results analyzed comparison with terms time difference between symptom initial MR imaging. RESULTS: At defined signal intensity increase more than 20%, compared contralateral side, showed best correlation size 1 week. per...
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