High-resolution diffusion-weighted imaging increases lesion detectability in patients with transient global amnesia.

ABSTRACT:

Background and purpose

DWI can detect small punctate hyperintense lesions of the hippocampus in patients with TGA. We investigated whether small TGA lesions can be detected more often by increasing the resolution of DWI.

Materials and methods

Of 31 consecutive patients with TGA, 27 underwent DWI, twice at the first visit (range 1.5-22 hours; mean 10 hours) and at follow-up (range 50-87 hours; mean 72.5 hours) after the onset of their symptoms. Each DWI included 2 different spatial resolutions with the same b-value (2000 seconds/mm(2)): conventional resolution in a 128 × 128 matrix with 3-mm section thickness and high resolution in a 220 × 220 matrix with 2-mm section thickness. The number and contrast of hyperintense lesions were compared between the 2 resolutions.

Result

SUBMITTER: Choi BS 

PROVIDER: S-EPMC7964774 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature