Principles and clinical applications of diffusion weighted echo planar MR imaging

The ultrafast capability of echo planar imaging(EPI) made diffusion-weighted MRI (DWI) measurements practical, without the need of head fixation and without the need to exclude patients unable to hold still. The DW hyperintensity and reduced apparent diffusion coefficient(ADC) were observed in all h...

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Bibliographic Details
Published inNihon rinshō Vol. 55; no. 7; p. 1742
Main Authors Ebisu, T, Tanaka, C, Umeda, M, Aoki, I
Format Journal Article
LanguageJapanese
Published Japan 01.07.1997
Subjects
Animals
Brain - pathology
Cerebral Hemorrhage - diagnosis
Cerebrovascular Disorders - diagnosis
Diagnosis, Differential
Echo-Planar Imaging - methods
Humans
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Summary:The ultrafast capability of echo planar imaging(EPI) made diffusion-weighted MRI (DWI) measurements practical, without the need of head fixation and without the need to exclude patients unable to hold still. The DW hyperintensity and reduced apparent diffusion coefficient(ADC) were observed in all hyperacute strokes, initially at 2.5 hours. In contrast to decreased ADC within 10 days and DW hyperintensity within 30 days, ADC was increased without DW hyperintensity in chronic stage. This suggests that DWI can discriminate between acute and chronic strokes. Furthermore, DWEPI and T2-weighted EPI were also be useful to detect and distinguish acute hemorrhagic stroke from nonhemorrhagic stroke. This review highlighted the promising technique of DWEPI to examine stroke patients in routine clinical practice.
ISSN:0047-1852