Journal of neuroimaging : official journal of the American Society of Neuroimaging
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The combination of phase demodulation and field mapping is a practical method to correct echo planar imaging (EPI) geometric distortion. However, since phase dispersion accumulates in each phase-encoding step, the calculation complexity of phase modulation is Ny-fold higher than conventional image reconstructions. Thus, correcting EPI images via phase demodulation is generally a time-consuming task. ⋯ GPU computing is a promising method to accelerate EPI geometric correction. The resulting reduction in computation time of phase demodulation should accelerate postprocessing for studies performed with EPI, and should effectuate the PROPELLER-EPI technique for clinical practice.
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Microvascular imaging (MVI), a new ultrasound technology, is used to analyze brain perfusion at the patient's bedside. This study aims to evaluate the diagnostic and prognostic value of MVI in patients with acute ischemic stroke (AIS). ⋯ Performing bedside MVI in the early phase of AIS provides information on brain parenchyma perfusion and prognosis of AIS.
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To assess the safety and efficacy of vertebral artery origin angioplasty and stenting for stroke prevention in a multicenter clinical experience. ⋯ Endovascular intervention of VAOS is associated with low peri-procedural complication rates. Restenosis remains a concern; age and smoking predicted future restenosis.
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The integrity of the fornix using diffusion tensor imaging (DTI) in adolescent participants with acute mild traumatic brain injury (mTBI) compared to a demographically matched control group was examined. Fractional anisotropy (FA) in the fornix was elevated in the mild traumatic brain injured group. ⋯ A relation was found between lower performance on cognitive tasks and higher FA. The potential role of fornix injury as a basis of memory and processing speed deficits in mTBI is discussed.
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High core body temperatures have been shown to selectively damage the cerebellum and basal ganglia in malignant hyperthermia, but involvement of both areas in neuroleptic malignant syndrome (NMS) has not been described. ⋯ Both the basal ganglia and cerebellum can be injured selectively in NMS.