RT Journal Article SR Electronic T1 Fiber Density Index Correlates with Reduced Fractional Anisotropy in White Matter of Patients with Glioblastoma JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 2183 OP 2186 VO 26 IS 9 A1 Roberts, Tim P.L. A1 Liu, Fang A1 Kassner, Andrea A1 Mori, Susumu A1 Guha, Abhijit YR 2005 UL http://www.ajnr.org/content/26/9/2183.abstract AB Summary: A quantitative description of white matter fiber attenuation, the fiber density index (FDi) is described. This measure is derived from quantitative analysis of diffusion tensor imaging and reveals an index of the number of fiber paths traversing a region of interest. In this report, FDi is computed in 10 patients with glioblastoma multiforme, in white matter that is peritumoral and contralateral. FDi is shown to correlate significantly with fractional anisotropy.