Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Feb 2004
Randomized Controlled Trial Comparative Study Clinical TrialTime-resolved contrast-enhanced three-dimensional pulmonary MR-angiography: 1.0 M gadobutrol vs. 0.5 M gadopentetate dimeglumine.
To compare contrast characteristics and image quality of 1.0 M gadobutrol with 0.5 M Gd-DTPA for time-resolved three-dimensional pulmonary magnetic resonance angiography (MRA). ⋯ No relevant advantages of 1.0 M gadobutrol over 0.5 M Gd-DTPA were observed for time-resolved pulmonary MRA in this study. Potential explanations are T2/T2*-effects caused by the high intravascular concentration when using high injection rates.
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J Magn Reson Imaging · Feb 2004
Automatic model-based evaluation of magnetic resonance-guided radio frequency ablation lesions with histological correlation.
To develop a model-based method for automatic evaluation of radio frequency (RF) ablation treatment using magnetic resonance (MR) images. ⋯ The method is accurate both in describing MR-apparent boundaries and in predicting histological response and has applications in lesion visualization, volume estimation, and treatment evaluation.
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J Magn Reson Imaging · Jan 2004
Comparative StudyCine MR imaging of heart valve dysfunction with segmented true fast imaging with steady state free precession.
To evaluate the value of cine true fast imaging with steady-state free precession (SSFP) for semiquantitative assessment of valvular dysfunction in the heart and to compare the results to that obtained with a standard breath-hold segmented gradient-recalled echo-planar imaging sequence (GE-EPI). ⋯ The results of this study suggest that valvular dysfunction can be semiquantitatively assessed using SSFP cine MR imaging.
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J Magn Reson Imaging · Jan 2004
Asymmetry and gender effect in functionally lateralized cortical regions: a proton MRS imaging study.
to compare metabolite concentrations and ratios in gray matter regions known for their anatomical/functional asymmetry and evaluate gender effect. ⋯ Metabolite concentrations and ratios were symmetric and gender independent in most brain regions, however small hemispheric side differences in the thalamus and in Wernicke's area were found.
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Pulmonary embolism (PE) is one of the most frequently encountered clinical emergencies. The diagnosis often involves multiple diagnostic tests, which need to be carried out rapidly to assist in the safe management of the patient. ⋯ Techniques include MR angiography (MRA) and thrombus imaging for direct clot visualization, perfusion MR, and combined perfusion-ventilation MR. As will be demonstrated, some of these techniques are now entering the clinical arena, and it is anticipated that MR imaging (MRI) will have an increasing role in the initial diagnosis and follow-up of patients with acute PE.