Journal of magnetic resonance imaging : JMRI
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To identify the pulse sequence and acquisition parameters that result in the most accurate and repeatable measurements of glutamate (Glu) concentration in the brain at 3T. ⋯ Further proof of concept is presented toward validation of a simulation approach to understand pulse sequence performance in measuring the concentration of a given metabolite. Improved within session Glu measurement repeatability is predicted for CPRESS and demonstrated in vivo.
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To investigate the feasibility of a vessel size imaging (VSI) technique with separate contrast agent injections for evaluation of the vessel caliber in normal tissues and in brain tumors. ⋯ This study suggests that VSI with a dual injection method is a feasible technique for estimating microvascular calibers of normal tissues and brain tumors in clinical scanners.
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J Magn Reson Imaging · Oct 2009
Toward a practical protocol for human optic nerve DTI with EPI geometric distortion correction.
To develop a practical protocol for diffusion tensor imaging (DTI) of the human optic nerve with echo planar imaging (EPI) geometric distortion correction. ⋯ The proposed technique could provide a practical DTI protocol to study the human optic nerve.
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J Magn Reson Imaging · Oct 2009
Comparative StudyDilution method of gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI).
To elucidate whether a contrast agent dilution method (dilution method), in which gadoxetate disodium (Gd-EOB-DTPA) is diluted with saline, is useful for good-quality arterial-phase images. ⋯ The dilution method contributed to improved image quality, high lesion-liver contrast, and high lesion detectability in the arterial-phase images of GD-EOB-DTPA-enhanced MRI.
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J Magn Reson Imaging · Oct 2009
Initial feasibility of a multi-station high resolution three-dimensional dark blood angiography protocol for the assessment of peripheral arterial disease.
To evaluate the feasibility of a multi-station three dimensional (3D) T1-weighted turbo spin echo (TSE) dark-blood Sampling Perfection with Application optimized Contrasts using different flip angle Evolution sequence (T1w-SPACE), to assess aorta, iliac, and superficial femoral (SFA) arteries (inflow vessels) by comparing it with a multi-station contrast enhanced MR angiography (CE-MRA) with identical resolution. ⋯ T1w-SPACE imaging of inflow vessels is feasible, and in addition to CE-MRA has the ability to assess atherosclerotic plaque and vascular remodeling.