alexa Diffusion-weighted MRI of subdural and epidural empyemas.


Emergency Medicine: Open Access

Author(s): Tsuchiya K, Osawa A, Katase S, Fujikawa A, Hachiya J,

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Abstract We reviewed diffusion-weighted images (DWI) from eight patients with subdural and four with epidural empyemas to assess the possibility of differentiating between these lesions by DWI. The signal intensities of the empyemas on DWI, and maps of the apparent diffusion coefficient (ADC) were analysed in seven patients. In seven of the eight patients with subdural empyema, the lesions appeared as areas of high signal. The ADC maps confirmed that these areas were the result of restricted diffusion. (In the remaining patient, the lesion showed a mixture of high and low signal.) The epidural empyemas contained areas of low signal in all four patients; part of the empyema was isointense or gave high signal in two. DWI may be an adjunct to conventional sequences for differentiating between subdural and epidural empyemas. This article was published in Neuroradiology and referenced in Emergency Medicine: Open Access

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