Journal
MAGNETIC RESONANCE IN MEDICAL SCIENCES
Volume 17, Issue 3, Pages 269-272Publisher
JPN SOC MAGNETIC RESONANCE MEDICINE
DOI: 10.2463/mrms.cr.2017-0111
Keywords
diffusion-weighted imaging; oscillating gradient spin-echo; restricted diffusion; tissue microstructure; epidermoid cyst
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We report two cases of pathologically proven intracranial epidermoid cysts. Both cases were scanned with diffusion-weighted imaging using pulsed gradient spin-echo (PGSE) and oscillating gradient spin-echo (OGSE; 50 Hz) prototype sequences with diffusion times of 47.3 ms and 8.5 ms, respectively. The apparent diffusion coefficient measured by OGSE was higher than that measured by PGSE, indicating the spatial restriction of water diffusion in the laminated keratin layers within the cyst as demonstrated by histopathology.
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