Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Mar 2004
Comparative StudyLimits of 8-Tesla magnetic resonance imaging spatial resolution of the deoxygenated cerebral microvasculature.
To quantify the minimum magnetic resonance imaging (MRI) spatial resolution of the visible deoxygenated microscopic vessels of the human brain at 8 T. ⋯ By taking advantage of magnetic susceptibility-based blood oxygenation level-dependent (BOLD) contrast, deoxygenated microscopic blood vessels smaller than the pixel dimensions used for imaging can be visualized using a whole-body 8-T MRI system.
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J Magn Reson Imaging · Mar 2004
Clinical TrialMR-guided radiofrequency ablation of hepatic malignancies at 1.5 T: initial results.
To assess the feasibility of magnetic resonance (MR)-guided radiofrequency ablation (RFA) of hepatic malignancies using a high-field MR scanner. ⋯ MR-guided RFA of hepatic malignancies in a closed-bore high-field MR scanner is technically feasible and safe. It can be advantageous in locations considered unfavorable for CT-guided puncture or in patients in which iodinated contrast material is contraindicated.
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J Magn Reson Imaging · Mar 2004
Usefulness of contrast kinetics for predicting and monitoring tissue changes in muscle following thermal therapy in long survival studies.
To investigate Gd-DTPA kinetics as indicators of subacute and subchronic histopathological changes following focused ultrasound (FUS) thermal therapy for improved evaluation. ⋯ Our results suggest that Gd-DTPA kinetics can complement conventional MR for improved evaluation of FUS thermal therapy by providing finer differentiation of necrotic states, inflammation, and repair processes.
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J Magn Reson Imaging · Feb 2004
Blood oxygenation level-dependent MRI of cerebral gliomas during breath holding.
To assess the cerebrovascular responses to short breath holding of cerebral gliomas using blood oxygenation level-dependent (BOLD) magnetic resonance imaging (MRI). ⋯ BOLD MRI during short breath holding can disclose differential cerebrovascular response between normal tissue and cerebral glioma.
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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.