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Epidermoid Tumour Brain--MRI

On T1-weighted images epidermoids are generally slightly hyperintense or isointense relative to gray matter. The lesions are usually isointense relative to CSF on T2-weighted images, but they may be slightly hyperintense. Now, diffusion-weighted imaging can be used to differentiate these entities, because epidermoids have markedly restricted diffusion and, therefore, high signal intensity on the diffusion-weighted trace images. The free water in arachnoid cysts has low signal intensity.
Epidermoid Tumour Brain--MRI Reviewed by Sumer Sethi on Friday, August 31, 2007 Rating: 5

1 comment:

HLauro said...

For more information on topics such as this please join us at our 12th Annual Clinical Magnetic Resonance Society Meeting, June 26 - 29, 2008 at Disney's Board Walk Resort in Lake Buena Vista, Fl.

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