Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Nov 2006
Clinical TrialDisplacement of the facial nerve course by vestibular schwannoma: preoperative visualization using diffusion tensor tractography.
To preoperatively visualize the course of the facial nerve, which is displaced by vestibular schwannoma, using diffusion tensor (DT) tractography, and to evaluate the agreement with surgical findings. ⋯ Tractographs constructed using MR tensor images enabled us to identify tracts considered to represent facial nerves. We consider DT tractography to be a useful tool for preoperatively predicting facial nerve displacement in vestibular schwannoma.
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J Magn Reson Imaging · Nov 2006
Fast magnetization-driven preparation for imaging of contrast-enhanced coronary arteries during intra-arterial injection of contrast agent.
To implement a short-duration magnetization preparation sequence, which consists of a saturation followed by multiple inversion pulses, for imaging of short-T1 species and suppression of long-T1 species. ⋯ This work demonstrates that fast magnetization-driven preparation schemes can be implemented for fast imaging of CE coronary vessels with efficient saturation of background species.
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To demonstrate the feasibility of whole-body magnetization transfer (MT) contrast imaging. ⋯ Our preliminary data indicate that MT contrast in whole-body MRI is feasible, and may be useful for rapid whole-body assessment of diseases that exhibit high contrast in MT imaging, such as MS and muscular disorders.
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J Magn Reson Imaging · Nov 2006
Controlled Clinical TrialAn fMRI study of somatosensory-implicated acupuncture points in stable somatosensory stroke patients.
To assess differences in brain responses between stroke patients and controls to tactile and electrical acupuncture stimulation using functional MRI (fMRI). ⋯ Differences observed between patients and controls on both tasks may indicate compensatory over recruitment of neocortical areas involved in somatosensory perception in the stroke patients. The observed differences between patients and controls on the acupoint stimulation task may also indicate that stimulation of acupoints used therapeutically to enhance recovery from stroke, selectively activates areas thought to be involved in mediating recovery from stroke via functional plasticity. fMRI of acupoint stimulation may illustrate the functional substrate of the therapeutically beneficial effect of acupuncture in stroke rehabilitation.
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J Magn Reson Imaging · Nov 2006
Respiratory-triggered MRCP applying parallel acquisition techniques.
To evaluate the influence of parallel imaging on the image quality of respiratory triggered magnetic resonance cholangiopancreatography (MRCP). ⋯ The application of parallel imaging for respiratory triggered MRCP significantly reduces the acquisition time without relevant influence on image quality.