Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Jul 2009
Cine cardiac imaging using black-blood steady-state free precession (BB-SSFP) at 3T.
To propose a new black-blood (BB) pulse sequence that provides BB cine cardiac images with high blood-myocardium contrast. The proposed technique is based on the conventional steady-state free precession (SSFP) sequence. ⋯ Based on an SSFP conventional sequence, the new sequence provides BB cines that cover most of the cardiac cycle and with higher SNR and CNR than the conventional BB sequences.
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J Magn Reson Imaging · Jul 2009
Reproducibility of dGEMRIC in assessment of hip joint cartilage: a prospective study.
To investigate the reproducibility of dGEMRIC in the assessment of cartilage health of the adult asymptomatic hip joint. ⋯ We found dGEMRIC to be a reliable tool in the assessment of cartilage health status in adult hip joints.
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J Magn Reson Imaging · Jul 2009
Improved myelin water quantification using spatially regularized non-negative least squares algorithm.
To improve the myelin water quantification in the brain in the presence of measurement noise and to increase the visibility of small focal lesions in myelin-water-fraction (MWF) maps. ⋯ The MWF variability due to the measurement noise can be substantially reduced and the detection of small focal lesions can be improved by using the srNNLS algorithm.
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J Magn Reson Imaging · Jul 2009
Characterization of low-grade gliomas using RGB color maps derived from ADC histograms.
To use normalized apparent diffusion coefficient (nADC) histograms from patients with grade II oligodendroglioma (OD) and astrocytoma (AC) to generate RGB color maps that emphasize the differences between normal-appearing white matter (NAWM), oligo-like, and astro-like regions. ⋯ This technique allows for the visualization of biologically different regions within the whole tumor mass, which may aid in directing image-guided biopsies. This can be used to ensure that the biopsy is directed to regions that can more accurately define the dominant tumor characteristics.
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J Magn Reson Imaging · Jun 2009
Optimized high-resolution mapping of magnetization transfer (MT) at 3 Tesla for direct visualization of substructures of the human thalamus in clinically feasible measurement time.
To optimize contrast-to-noise and spatial resolution of a FLASH-based magnetization transfer (MT) protocol for visualization of substructures in human thalamus. ⋯ Semiquantitative MT saturation maps provide an enhanced intra-thalamic contrast. The borders and nuclear groups of the thalamus are reliably delineated; individual assignment of singular nuclei seems feasible.