RT Journal Article SR Electronic T1 Progressive Multifocal Leukoencephalopathy: Serial High-b-Value Diffusion-Weighted MR Imaging and Apparent Diffusion Coefficient Measurements to Assess Response to Highly Active Antiretroviral Therapy JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 285 OP 286 VO 28 IS 2 A1 Usiskin, S.I. A1 Bainbridge, A. A1 Miller, R.F. A1 Jäger, H.R. YR 2007 UL http://www.ajnr.org/content/28/2/285.abstract AB SUMMARY: A patient with human immunodeficiency virus–related posterior fossa progressive multifocal leukoencephalopathy had serial diffusion-weighted imaging using b-values of 1000 and 3000 before and during highly active antiretroviral therapy (HAART). High-b-value images provided a superior definition of the leading edge of the lesion and additional information about the integrity of white matter tracts. Following HAART, there was a marked reduction of lesional apparent diffusion coefficient and reconstitution of anisotropy in the affected middle cerebellar peduncle.