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Titolo:
Detection of hyperacute parenchymal hemorrhage of the brain using echo-planar T2*-weighted and diffusion-weighted MRI
Autore:
Wiesmann, M; Mayer, TE; Yousry, I; Hamann, GF; Bruckmann, H;
Indirizzi:
Univ Munich, Klinikum Grosshadern, Dept Neuroradiol, D-81377 Munich, Germany Univ Munich Munich Germany D-81377 Neuroradiol, D-81377 Munich, Germany Med Univ Lubeck, Dept Radiol, D-23538 Lubeck, Germany Med Univ Lubeck Lubeck Germany D-23538 t Radiol, D-23538 Lubeck, Germany Univ Munich, Klinikum Grosshadern, Dept Neurol, D-81377 Munich, Germany Univ Munich Munich Germany D-81377 Dept Neurol, D-81377 Munich, Germany
Titolo Testata:
EUROPEAN RADIOLOGY
fascicolo: 5, volume: 11, anno: 2001,
pagine: 849 - 853
SICI:
0938-7994(2001)11:5<849:DOHPHO>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACUTE SUBARACHNOID HEMORRHAGE; INTRACEREBRAL HEMORRHAGE; STROKE; SEQUENCES; DIAGNOSIS; BLOOD;
Keywords:
intracerebral hemorrhage; stroke; MR imaging; echo-planar imaging; diffusion-weighted imaging;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Bruckmann, H Univ Munich, Klinikum Grosshadern, Dept Neuroradiol, Marchioninistr 15, D-81377 Munich, Germany Univ Munich Marchioninistr 15 Munich Germany D-81377 Germany
Citazione:
M. Wiesmann et al., "Detection of hyperacute parenchymal hemorrhage of the brain using echo-planar T2*-weighted and diffusion-weighted MRI", EUR RADIOL, 11(5), 2001, pp. 849-853

Abstract

We investigated the usefulness of echo-planar imaging (EPI) as well as T2*-weighted and diffusion-weighted MRI (DWI) to identify hyperacute hemorrhage (within 24 h after ictus) in the brain. Seven patients were examined 3.5 to 24 h after onset of symptoms using a whole-body 1.5-T MR system. Two diffusion-weighted sequences were run to obtain isotropic and anisotropic diffusion images. Apparent diffusion coefficients (ADC) were calculated from the isotropic diffusion images. All DWI images as well as the T2*-weighted EPI images showed the hematomas as either discrete, deeply hypointense homogeneous lesions, or as lesions of mixed signal intensity containing hypointense areas. We conclude that even in the early phase after hemorrhage, sufficient amounts of paramagnetic deoxyhemoglobin are present in intracerebral hemorrhages to cause hypointensity on EPI T2*-weighted and DWI images; thus,use of ultrafast EPI allows identification of intracerebral hemorrhage.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 08:59:41