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Figure 2. Herpes simplex encephalitis. (a) T2 weighted axial image shows abnormal increased signal intensities in both temporal lobes involving gray and white matter. These are hypointense on (b) T1 weighted image and mildly hyperintense on (c) T1 weighted magnetization transfer (MT) image. No abnormal meninges are seen on pre-contrast images. (d) Post-contrast T1 weighted MT image shows abnormal meningeal enhancement in both hemispheres along with left ependymal enhancement.
