Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Jan 2010
Scan-rescan reproducibility of carotid atherosclerotic plaque morphology and tissue composition measurements using multicontrast MRI at 3T.
To evaluate interscan reproducibility of both vessel morphology and tissue composition measurements of carotid atherosclerosis using a fast, optimized, 3T multicontrast protocol. ⋯ The results from the multicontrast high-resolution 3T MR study show high reliability for carotid morphology and plaque component measurements. 3T MRI is a reliable tool for longitudinal clinical trials, with shorter scan time compared to 1.5T.
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J Magn Reson Imaging · Jan 2010
Adaptive non-local means denoising of MR images with spatially varying noise levels.
To adapt the so-called nonlocal means filter to deal with magnetic resonance (MR) images with spatially varying noise levels (for both Gaussian and Rician distributed noise). ⋯ The new noise-adaptive method was demonstrated to outperform the standard filter when spatially varying noise is present in the images.
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J Magn Reson Imaging · Jan 2010
Flow-independent T(2)-prepared inversion recovery black-blood MR imaging.
To develop a magnetization preparation method to achieve robust, flow-independent blood suppression for cardiac and vascular magnetic resonance imaging (MRI). ⋯ T(2)Prep-IR may overcome the flow dependence of DIR by providing robust flow-independent black-blood images.
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To extend susceptibility weighted imaging (SWI) to multiple echoes with an adapted homodyne filtering of phase images for the computation of venograms with improved signal to noise ratio (SNR) and contrast to noise ratio (CNR) and to produce high resolution maps of R(2) relaxation. ⋯ Acquisition of SWI with multiple echoes leads to an increase in SNR and CNR and it allows the computation of high resolution maps of R(2) relaxation.