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Detection of apparent restricted diffusion in healthy rat brain at short diffusion times

✍ Scribed by Thoralf Niendorf; David G. Norris; Dieter Leibfritz

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
568 KB
Volume
32
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

The application of bipolar diffusion sensitizing gradient pulses to significantly reduce the diffusion time is described. This approach is combined with the rapid U‐FLARE imaging sequence. Three diffusion‐sensitized types of experiments are compared and their suitability for detecting restricted diffusion is discussed. Experiments using a modification of the diffusion weighting by varying the diffusion time between 1.6 and 6.0 ms obtained nonmonoexponential signal attenuation curves from both healthy brains and postmortem. This behavior is indicative of restricted diffusion, but as it is detectable only at short diffusion times, in contrast to a restriction due to impermeable barriers, we have termed this β€œapparent restriction”.

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