Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Dec 2004
Quantitative cerebral perfusion using the PRESTO acquisition scheme.
To evaluate the feasibility of using the rapid principles of echo shifting with a train of observations (PRESTO) sequence for measurements of cerebral hemodynamic parameters based on first pass of a contrast agent. ⋯ The study showed that PRESTO and EPI led to comparable quantitative perfusion parameters.
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J Magn Reson Imaging · Dec 2004
Neurochemistry of late-life major depression: a pilot two-dimensional MR spectroscopic study.
To evaluate a two-dimensional localized chemical shift correlated spectroscopy (L-COSY) sequence in elderly patients with major depression. ⋯ Our pilot study shows the feasibility of performing two-dimensional L-COSY successfully in elderly subjects and patients with late-life mood disorders. These findings are consistent with and expand on our earlier findings in major depressive disorder (MDD) detected with one-dimensional MRS.
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J Magn Reson Imaging · Nov 2004
Comparative Study Clinical TrialMagnetic resonance imaging of articular cartilage of the knee: comparison between fat-suppressed three-dimensional SPGR imaging, fat-suppressed FSE imaging, and fat-suppressed three-dimensional DEFT imaging, and correlation with arthroscopy.
To compare signal-to-noise ratios (S/N) and contrast-to-noise ratios (C/N) in various MR sequences, including fat-suppressed three-dimensional spoiled gradient-echo (SPGR) imaging, fat-suppressed fast spin echo (FSE) imaging, and fat-suppressed three-dimensional driven equilibrium Fourier transform (DEFT) imaging, and to determine the diagnostic accuracy of these imaging sequences for detecting cartilage lesions in osteoarthritic knees, as compared with arthroscopy. ⋯ Fat-suppressed three-dimensional SPGR imaging and fat-suppressed FSE imaging showed high sensitivity and high negative predictive values, but relatively low specificity. The Kappa value and exact agreement was the highest on fat-suppressed FSE short TE images. Fat-suppressed three-dimensional DEFT images showed results similar to the conventional sequences.
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J Magn Reson Imaging · Nov 2004
Discovery and disclosure of incidental findings in neuroimaging research.
To examine different protocols for handling incidental findings on brain research MRIs, and provide a platform for establishing formal discussions of related ethical and policy issues. ⋯ Guidelines for minimum and optimum standards for detecting and communicating incidental findings on brain MRI research are needed.
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J Magn Reson Imaging · Nov 2004
Comparative Study Clinical TrialMagnetic resonance imaging of knee cartilage using a water selective balanced steady-state free precession sequence.
To compare an optimized water selective balanced steady-state free precession sequence (WS-bSSFP) with conventional magnetic resonance (MR) sequences in imaging cartilage of osteoarthritic knees. ⋯ A WS-bSSFP sequence is superior to conventional MR imaging sequences in imaging cartilage of the knee in patients with osteoarthritis.