Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Sep 2013
Randomized Controlled TrialOptimizing MRI scan time in the computation of pharmacokinetic parameters (K(trans) ) in breast cancer diagnosis.
To assess the effects of reduced scan time in dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) of breast for the evaluation of pharmacokinetic parameters (K(trans) , ve , and kep ). ⋯ Reducing the acquisition time for the K(trans) and ve measurement up to 60 seconds yields reasonable accuracy for both and can be incorporated in the routine DCE-MRI protocol for evaluation of enhancing breast lesions.
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J Magn Reson Imaging · Sep 2013
Comparative Study3D coronary MR angiography at 1.5 T: Volume-targeted versus whole-heart acquisition.
To compare volume-targeted acquisition with whole-heart acquisition in 1.5-T free-breathing 3D coronary magnetic resonance angiography (MRA) with parallel imaging. ⋯ For current 1.5-T navigator coronary MRA, volume-targeted and whole-heart acquisitions have their own advantages and the choice of methods may vary in accordance with the different aims of clinical practice.
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J Magn Reson Imaging · Sep 2013
Comparative StudyDiffusion-weighted imaging of the prostate: Comparison of b1000 and b2000 image sets for index lesion detection.
To compare tumor detection on acquired diffusion-weighted (DW) images and apparent diffusion coefficient (ADC) maps, obtained using b-values of 1000 s/mm(2) and 2000 s/mm(2) , using radical prostatectomy as the reference. ⋯ Use of a b-value of 2000 s/mm(2) compared with a b-value of 1000 s/mm(2) resulted in improved tumor sensitivity and higher tumor-to-PZ contrast on the acquired DW images, although performance of the ADC maps corresponding with the two b-values was similar. Correlation with tumor size was greater for either ADC map than for either acquired DW image set.
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J Magn Reson Imaging · Sep 2013
Randomized Controlled TrialTiming of the hepatic arterial phase at Gd-EOB-DTPA-enhanced hepatic dynamic MRI: comparison of the test-injection and the fixed-time delay method.
To compare the fixed-time- and the test-injection method with respect to the image quality of hypervascular hepatocellular carcinoma (HCC) and the adequacy of timing of the hepatic arterial phase (HAP) in Gd-EOB-DTPA (EOB) enhanced MRI. ⋯ At EOB-enhanced hepatic dynamic MRI, the test-injection method yielded better image quality of hypervascular HCC and improved adequacy of timing of HAP.
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J Magn Reson Imaging · Sep 2013
Comparative StudyComparison of dixon and T1-weighted MR methods to assess the degree of fat infiltration in duchenne muscular dystrophy patients.
To compare different lipid multipeak spectral models to the single-peak model in Dixon-based fat-water separation and to evaluate differences between visually scored magnetic resonance (MR) images and quantitatively assessed fat fractions in muscle of Duchenne muscular dystrophy patients. ⋯ There are minor differences between the various lipid spectral models in terms of quantifying fat fraction in a large number of skeletal muscles in the legs of Duchenne patients and healthy controls. Quantitative 3-point Dixon MRI is more precise and reliable than visual radiological methods for evaluation of fat fractions for potential longitudinal follow-up or therapy evaluation of Duchenne patients.