Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Jan 2008
Effects of doubling and tripling the spatial resolution in standard 3D contrast-enhanced magnetic resonance angiography of carotid artery disease.
To determine whether three-dimensional (3D) contrast-enhanced MR angiography (CE-MRA) of carotid artery disease may be more effective when performed at double or triple the spatial resolution of the present common clinical standard at 1.5T. ⋯ In patients with carotid artery stenosis, decreasing the voxel volume to 0.5 mm(3) by increasing the scan time from 21 to 40 seconds resulted in sharper depiction of the carotid stenosis. Further decreases in voxel volume, by extending the acquisition time further, did not improve the vessel depiction due to both signal-to-noise ratio (SNR) and sharpness losses.
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J Magn Reson Imaging · Jan 2008
Randomized Controlled TrialRapid multiplanar abdominal survey using MRI with the steady-state free-precession technique.
To retrospectively evaluate the sensitivity, specificity, and positive and negative predictive values of steady-state free-precession (SSFP) survey MRI of the abdomen. ⋯ SSFP provides a rapid survey of the abdomen, with good sensitivity and few false positives.