PT - JOURNAL ARTICLE AU - S.I. Usiskin AU - A. Bainbridge AU - R.F. Miller AU - H.R. Jäger TI - Progressive Multifocal Leukoencephalopathy: Serial High-b-Value Diffusion-Weighted MR Imaging and Apparent Diffusion Coefficient Measurements to Assess Response to Highly Active Antiretroviral Therapy DP - 2007 Feb 01 TA - American Journal of Neuroradiology PG - 285--286 VI - 28 IP - 2 4099 - http://www.ajnr.org/content/28/2/285.short 4100 - http://www.ajnr.org/content/28/2/285.full SO - Am. J. Neuroradiol.2007 Feb 01; 28 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.