Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Susceptibility-Weighted Imaging (SWI) is a relatively new magnetic resonance imaging (MRI) sequence relying on susceptibility differences between adjacent tissues to produce an image. It is extremely sensitive for detection of blood products (hemosiderin, ferritin), deoxygenated blood, calcium, iron, and small vein depiction. Little information is available in the literature to describe common findings seen using this imaging sequence. This article is an comprehensive review of appearances across the spectrum of brain pathology encountered in routine clinical practice. ⋯ SWI is an extremely useful adjunct to current MRI sequences of the brain and is advocated for inclusion into routine Neuroimaging protocols.
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We describe the essential diffusion tensor imaging (DTI) findings of right cerebral hemisphere infarctions and study whether the DTI parameters and neurological status differ in patients with visible wallerian degeneration (WD) or small hemorrhagic transformation (HT) in the chronic stage. ⋯ DTI reveals the changes after infarction in the lesion site and elsewhere. The patients with visible WD or HT have more changes in the DTI parameters and worse outcome scores.
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Susceptibility-weighted imaging (SWI) is a relatively new MRI sequence relying on susceptibility differences between adjacent tissues to produce an image. It is extremely sensitive for detection of blood products (hemosiderin, ferritin), deoxygenated blood, calcium, iron, and small vein depiction. ⋯ The potential of this new sequence can be reviewed in comprehensive article "Susceptibility-Weighted Imaging of the Brain: Current Utility and Potential Applications" available online. SWI is an extremely useful adjunct to current MRI sequences of the brain and is advocated for inclusion into routine Neuroimaging protocols.
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Recombinant tissue plasminogen activator (rtPA)-associated hyperperfusion syndrome in brainstem after acute stroke has not yet been reported. The current report demonstrates that rtPA-associated hyperperfusion syndrome can be a cause of clinical deterioration following improvement (DFI) after rtPA in acute stroke. ⋯ rtPA-associated hyperperfusion can occur at brainstem causing transient neurological deficits. It can be a cause of DFI in addition to reocclusion after recanalization.
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Stroke is one of the most feared complications after cardiac catheterization. Endovascular treatment combining mechanical and pharmacological therapy has been reported as an effective treatment option in selected patients with acute stroke due to large-vessel occlusion. Little is known about safety and clinical outcome when this approach is utilized in cardiac catheterization associated strokes. ⋯ In acute strokes following cardiac catheterization, multimodal endovascular therapy is safe and feasible and despite a high mortality is associated with a higher than expected rate of favorable outcomes compared to the natural history of the disease. Despite a significant proportion of patients developing symptoms in hospitals where neurointerventions are available, the median time to treatment was longer than expected. Future efforts should focus on faster implementation of recanalization therapies for this form of acute stroke.