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
Silicone-specific imaging using an inversion-recovery-prepared fast three-point Dixon technique.
To demonstrate a new hybrid magnetic resonance imaging (MRI) technique capable of simultaneously generating water-specific and silicone-specific images in a single acquisition. ⋯ The feasibility and potential application of the new technique were demonstrated via imaging a phantom and a silicone breast prosthesis in vivo, and it may be used for more consistent imaging of the silicone implants without compromising the image quality or overall scan time.
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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
Comparative StudyMagnetic resonance portography using contrast-enhanced fat-saturated three-dimensional steady-state free precession imaging.
To assess the feasibility of contrast-enhanced fat-saturated three-dimensional steady-state free precession (FIESTA) imaging for contrast-enhanced magnetic resonance (MR) portography. ⋯ Contrast-enhanced fat-saturated three-dimensional FIESTA was valuable for MR portography, with flexible time window and high vascular signals. This imaging may allow for other post-contrast imaging options before portography and release patients from consecutive breath-holds.