Diffusion-Weighted MR Imaging of the Brain by Moritani T., Ekholm S., Westesson P.-L.

By Moritani T., Ekholm S., Westesson P.-L.

Diffusion-weighted MR imaging is extensively authorized as a way to spot stroke, therefore allowing swift and potent therapy. during the last 4 years, those professional authors have provided over 30 indicates and clinical stories on diffusion-weighted imaging on the RSNA and the yankee Society of Neuroradiology (ASNR), and greater than 10 of those shows were well-known by way of particular awards. Diffusion-Weighted MR Imaging of the Brain’s chapters variety from easy rules to interpretation of diffusion-weighted MR imaging and particular disorder. it is a important reference for radiologists, neurologists, neurosurgeons in addition to citizens, fellows, radiology technologists.

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Extra resources for Diffusion-Weighted MR Imaging of the Brain

Sample text

C ADC map shows these lesions as decreased ADC. d 4-month follow-up MRI shows prominent brain atrophy. 10 a–c Diffuse axonal injury in an 18year-old female 48 h after motor vehicle accident. b DW image demonstrates diffuse axonal injury as high signal intensity, representing cytotoxic edema (arrows). c ADC map shows decreased ADC lesions in the anterior to posterior corpus callosum and the frontal deep white matter (arrows). a T2-weighted image shows hyperintense lesion involving the right basal ganglia, the posterior limb of the internal capsule and corona radiata, representing an acute infarct.

66-year old man presented with stroke and seizure. a T2-weighted image shows multiple hyperintense lesions in the right frontoparietal area (arrows). b, c DW image shows these lesions as very hyperintense with decreased ADC, representing acute infarcts in the watershed area between anterior and middle cerebral arteries (arrows). d MRA shows bilateral stenoses of internal carotid, and middle and anterior cerebral arteries (arrows). 2. 1 Predisposing Factors Perfusion MR imaging may be more sensitive than DW imaging in the detection of a hyperacute cerebral infarction, but it currently entails extensive post-processing to create interpretable perfusion maps (Figs.

D Perfusion-weighted image shows increase in mean transit time of the entire left anterior and MCA territories. e Follow-up DW image 2 days later shows only a very subtle hyperintensity in the left frontal white matter (arrows). f ADC was normalized, which is in accordance with clinical improvement. 7 Watershed Infarction Watershed infarction may develop between two major vascular territories or within a single territory in the supraganglionic white matter, a border zone of the superficial and deep penetrating arterioles (Fig.

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