Gilberto González

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Few studies have described the metabolic substrates underlying neuropsychological performance in HIV infection or examined the specificity of these relationships. The authors performed magnetic resonance spectroscopic and neuropsychological evaluations on 61 patients with AIDS dementia complex (stages 1-3) and 39 HIV-positive neurologically asymptomatic(More)
PURPOSE To study the spontaneous low-frequency blood oxygenation level-dependent (BOLD) functional MRI (fMRI) signal fluctuations during hyperacute focal cerebral ischemia. MATERIALS AND METHODS A stroke model in nonhuman primates (macaques) was used in this study. Spontaneous fluctuations were recorded using a series of gradient-recalled echo (GRE)(More)
Vitamin D status has been extensively studied throughout the world. However, most of the studies are from North America, Europe and Oceania. This review describes published evidence on vitamin D status among healthy postmenopausal women in South America, where food is not fortified with vitamin D. A literature search identified ten studies from only three(More)
BACKGROUND AND PURPOSE Isolated lesions of the medulla oblongata are difficult to diagnose due to their rarity and high biopsy risk. Several individual case reports have been published, but a systematic descriptive study is lacking. Our study has three objectives that 1) provide a differential diagnosis, 2) describe magnetic resonance imaging (MRI)(More)
BACKGROUND AND PURPOSE To compare an ultrafast brain magnetic resonance imaging (MRI) protocol to the conventional protocol in motion-prone inpatient clinical settings. METHODS This retrospective study was HIPAA compliant and approved by the Institutional Review Board with waived inform consent. Fifty-nine inpatients (30 males, 29 females; mean age 55.1,(More)
BACKGROUND Gliomas with mutant isocitrate dehydrogenase (IDH) produce high levels of 2-hydroxyglutarate (2HG) that can be quantitatively measured by 3D magnetic resonance spectroscopic imaging (MRSI). Current glioma MRI primarily relies upon fluid-attenuated inversion recovery (FLAIR) hyperintensity for treatment planning, although this lacks specificity(More)
Acknowledgments I feel very grateful for having had the opportunity to pursue my doctoral degree at HST and for the support, the help and the encouragement from the people I met during my graduate studies. I thank my advisor, Dr. Robert Mulkern, who educated me in many aspects of research. His willingness to spend time discussing problems, to help in(More)
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