Detection of acute stroke with diffusion-weighted MRI.
Diffusion-weighted MRI is a new imaging method that can detect acute ischemic stroke within an hour of onset. The first hour following a stroke is crucial, because it is during this time that damaged tissue can be saved. Diffusion-weighted imaging measures the water mobility in tissue. Using these measurements, MRI images can be reconstructed to provide quantified data regarding actual tissue damage. The initial images are obtained using a modified fast spin echo, gradient echo sequence, echo-planar imaging or a navigator echo. These ultrafast sequences are used to eliminate motion artifacts so maximum data can be obtained.
Dunithan
A J
AJ
Department of Radiologic Sciences, School of Allied Health Sciences/School of Medicine, Indiana University Medical Center, Indianapolis, USA.
Cox
L A
LA
Long
B W
BW
D000208:Acute Disease; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology*; D002545:Brain Ischemia / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed