Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Jul 2011
Review Meta AnalysisDiagnostic value of whole-body magnetic resonance imaging for bone metastases: a systematic review and meta-analysis.
To assess the overall diagnostic accuracy of whole-body magnetic resonance imaging (WB-MRI) in detecting bone metastases with a meta-analysis. ⋯ WB-MRI was an accurate, cost-effective tool in detecting bone metastases. WB-MRI without DWI may improve the specificity of detecting bone metastases. DWI seems to be a sensitive but rather unspecific modality for the detection of bone metastatic disease. High-quality prospective studies regarding WB-MRI in detecting bone metastases still need to be conducted.
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J Magn Reson Imaging · Jul 2011
Robust mapping of the myelin water fraction in the presence of noise: synergic combination of anisotropic diffusion filter and spatially regularized nonnegative least squares algorithm.
To improve the mapping of myelin water fraction (MWF) despite the presence of measurement noise, and to increase the visibility of fine structures in MWF maps. ⋯ This study demonstrates that the benefits of ADF and srNNLS algorithms can be effectively combined in a synergic way for robust mapping of MWF in the presence of noise. Substantial improvements to MWF mapping can be made using the proposed method.
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J Magn Reson Imaging · Jul 2011
New respiratory gating technique for whole heart cine imaging: integration of a navigator slice in steady state free precession sequences.
To evaluate the performance of a slice navigator sequence integrated into a b-SSFP sequence for obtaining real time respiratory self-gated whole heart cine imaging. ⋯ This novel method represents a robust approach to estimate breathing motion during SSFP imaging. The technique was successfully applied to acquire whole heart artifact-free cine images.
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J Magn Reson Imaging · Jul 2011
Quantitative assessment of cardiac output and left ventricular function by noninvasive phase-contrast and cine MRI: validation study with invasive pressure-volume loop analysis in a swine model.
To validate noninvasive cardiac output measurements of phase-contrast magnetic resonance imaging (PC-MRI) and cine MRI using an invasive pressure-volume (PV) loop technique on a swine model. ⋯ MRI can provide a reliable, noninvasive measurement of cardiac output that can be carried out without the complications that are inherent with current invasive procedures.
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J Magn Reson Imaging · Jul 2011
Reproducibility analysis of diffusion tensor indices and fiber architecture of human calf muscles in vivo at 1.5 Tesla in neutral and plantarflexed ankle positions at rest.
To investigate the reproducibility of diffusion tensor imaging (DTI) -derived indices and fiber architecture of calf muscles at 1.5 Tesla (T), to establish an imaging based method to confirm ankle position, and to compare fiber architecture at different ankle positions. ⋯ DTI at 1.5T provides reproducible measures of diffusion indices and fiber architecture of calf muscle at different muscle lengths.