1. Representative DTI fractional anisotropy (FA) and color vector map images of patient 9 with a left parietal angioma.
Representative DTI fractional anisotropy (FA) and color vector map images of patient 9 with a left parietal angioma. FDG-PET showed severe hypometabolism in the parietal lobe (Fig 2), whereas SWI visualized deep frontocentral transmedullary veins (see affected area in the SWI panel on the right) apparently draining from mildly hypometabolic cortex. FA map demonstrates decreased FA values extending into the frontal lobe. On the color map, fiber directions are color-coded based on the main eigenvector (red, left-right, green, anteroposterior, blue, superior-inferior). Note that in the central white matter region encompassing the deep veins, red and dark purple-coded voxels dominate, indicating an increased number of voxels with transverse (left-right) as well as oblique direction of water diffusion as opposed to the right (normal) side containing more fibers with superior-inferior direction. Both FA and color maps show severe loss and disorganization of white matter in the left parietal area under the angioma (arrows).
C. Juhász et al. AJNR Am J Neuroradiol 2007;28:
©2007 by American Society of Neuroradiology