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FIG 3. An 8-year-old girl presented with fever, tooth infection, and signs of raised intracranial tension.
T2-weighted axial image (A) through the lateral ventricles shows hyperintense lesion with hypointense peripheral rim in the right periventriclular region and is associated with mass effect. Corresponding T1 (B) and postcontrast T1-weighted MT (C) images show central hypointensity with peripheral rim extending to the body of the corpus callosum. DW image (D) and Dav map (E) show areas of restricted diffusivity. FA map (F) show very high values in the medial part of the abscess cavity, and variable FA in the lateral part of the cavity (0.12–0.32). Color-modulated FA map fused on Dav map shows (G) the same with orientation. Following drill aspiration of the abscess cavity, a repeat DTI was done after 5 days. Follow-up T2-weighted image (H) shows residual cavity with mild ventricular dilatation. Postcontrast T1-weighted MT image (I) shows rim enhancement of the residual cavity with ependymal enhancement, which suggests ependimitis. Dav map (J) shows high diffusivity and FA map (K) shows marked decrease in values compared with panel F. Color-modulated FA maps (L) fused with Dav shows the loss of orientation compared with panel G.
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