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BACKGROUND AND PURPOSE We measured the temporal evolution of the T2 and diffusion tensor imaging parameters after transient and permanent cerebral middle cerebral artery occlusion (MCAo) in macaques, and compared it to standard histological analysis at the study end point. METHODS Stroke was created in adult male macaques by occluding a middle cerebral(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)
This article presents a warping technique for correcting brain tissue distortion on magnetic resonance imaging (MRI) scans due to stroke lesion growth and for mapping MRI scans to histological sections. Meshes are imposed upon the images for feature specification, and these features are exactly matched in the different images to be mapped, while the other(More)
Complete surgical resection of intra-axial hypervascular tumors located in the posterior fossa, in particular hemangioblastomas, may be challenging due to tumor location, mass effect and excessive bleeding. Embolization of these lesions can be done preoperatively or as a palliative measure in patients who are not surgical candidates. Preoperative(More)
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