Higher lesion detection by 3.0T MRI in patient with transient global amnesia.
OBJECTIVE
Transient global amnesia (TGA) patients were retrospectively reviewed to determine the usefulness of high-field strength MRI in detecting probable ischemic lesions in TGA.


METHODS
We investigated the lesion detection rate in patients with TGA using 1.5T and 3.0T MRI. Acute probable ischemic lesions were defined as regions of high-signal intensity in diffusion weighted image with corresponding low-signal intensity in apparent diffusion coefficient map.


RESULTS
3.0T MRI showed 11 out of 32 patients with probable ischemic lesions in the hippocampus with mean lesion size of 2.8 +/- 0.6 mm, whereas 1.5T MRI detected no lesion in any of 11 patients. There were no significant differences in clinical characteristics between the groups of 1.5 and 3.0T MRI.


CONCLUSIONS
High-field strength MRI has a higher detection rate of probable ischemic lesions than low-field strength MRI in patients with TGA.
Department of Neurology, Yonsei University College of Medicine, Gangnam-Gu, Seoul, Korea.
Seung-Yeob
SY
Lee
Won Joo
WJ
Kim
Sang Hyun
SH
Suh
Seung Hun
SH
Oh
Kyung-Yul
KY
Lee
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D020236:Amnesia, Transient Global / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D055815:Young Adult