Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Sep 2010
Effect of the extracranial deep brain stimulation lead on radiofrequency heating at 9.4 Tesla (400.2 MHz).
To study the effect of the extracranial portion of a deep brain stimulation (DBS) lead on radiofrequency (RF) heating with a transmit and receive 9.4 Tesla head coil. ⋯ Development of protocols seems feasible to keep RF heating near DBS electrodes clinically safe during ultra-high field head imaging.
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J Magn Reson Imaging · Sep 2010
Comparative StudyComparison between areas with Gd-EOB-DTPA uptake and without in hepatocellular carcinomas on Gd-EOB-DTPA-enhanced hepatobiliary-phase MR imaging: pathological correlation.
To determine histological and MR imaging differences between areas with Gd-EOB-DTPA (gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid) uptake and without in hepatocellular carcinomas (HCCs) as seen on Gd-EOB-DTPA-enhanced hepatobiliary-phase MR images. ⋯ Although macroscopically, a non-hypointense area of an HCC seen on GD-EOB-DTPA-enhanced hepatobiliary-phase images may be associated with the area with a green color, no definite microscopic and MR imaging findings that could discriminate a non-hypointense from a hypointense area of an HCC was found.
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J Magn Reson Imaging · Sep 2010
T(2)-weighted 3D fast spin echo imaging with water-fat separation in a single acquisition.
To develop a robust 3D fast spin echo (FSE) T(2)-weighted imaging method with uniform water and fat separation in a single acquisition, amenable to high-quality multiplanar reformations. ⋯ 3D-FSE-IDEAL provides volumetric T(2)-weighted images with uniform water and fat separation in a single acquisition. High-resolution images with multiple contrasts can be reformatted to any orientation from a single acquisition. This could potentially replace 2D-FSE acquisitions with and without fat suppression and in multiple planes, thus improving overall imaging efficiency.
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J Magn Reson Imaging · Aug 2010
Impact of motion on T1 mapping acquired with inversion recovery fast spin echo and rapid spoiled gradient recalled-echo pulse sequences for delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) in volunteers.
To evaluate the impact of motion on T1 values acquired by using either inversion-recovery fast spin echo (IR-FSE) or three-dimensional (3D) spoiled gradient recalled-echo (SPGR) sequences for delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) in volunteers. ⋯ Involuntary motion has a significant influence on T1 values acquired with IR-FSE, but not with 3D-SPGR in healthy volunteers.
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J Magn Reson Imaging · Aug 2010
3D flow-independent peripheral vessel wall imaging using T(2)-prepared phase-sensitive inversion-recovery steady-state free precession.
To develop a 3D flow-independent peripheral vessel wall imaging method using T(2)-prepared phase-sensitive inversion-recovery (T(2)PSIR) steady-state free precession (SSFP). ⋯ T(2)PSIR SSFP is a promising technique for peripheral vessel wall imaging. It provides excellent blood signal suppression and vessel wall/lumen contrast. It can cover a 3D volume efficiently and is flow- and TI-independent.