Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Nov 2002
Tissue thermal conductivity by magnetic resonance thermometry and focused ultrasound heating.
To investigate the combined use of magnetic resonance (MR) temperature imaging and focused ultrasound (FUS) for the noninvasive determination of tissue thermal properties. ⋯ This study has developed a method for determining tissue thermal properties specific to the patient and organ at the site of interest, and allows repeated application. This capability is relevant in thermal therapy planning of tumor ablation using MR-guided FUS systems.
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To examine functional magnetic resonance imaging (fMRI) of the rat cervical spinal cord using painful stimulation. ⋯ Spinal fMRI using electrical stimulation and capsaicin-induced painful stimulation can be a useful tool in an animal model of pain and injury.
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J Magn Reson Imaging · Sep 2002
Analysis of the spatial characteristics of metabolic abnormalities in newly diagnosed glioma patients.
To evaluate the role of 3D MR spectroscopic imaging (MRSI) as a tool for characterizing heterogeneity within a lesion in glioma patients. ⋯ These 3D-MRSI data provide important additional information to conventional MRI for evaluating and characterizing gliomas.
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J Magn Reson Imaging · Sep 2002
Hybrid phased array for improved internal auditory canal imaging at 3.0-T MR.
To develop and evaluate a hybrid phased array for internal auditory canal (IAC) imaging at 3.0 T. ⋯ This hybrid array combined with three-dimensional fast spin-echo (FSE) acquisition resulted in improved high spatial resolution IAC imaging.
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J Magn Reson Imaging · Sep 2002
Dynamic coronary MR angiography and first-pass perfusion with intracoronary administration of contrast agent.
To evaluate whether dynamic imaging of the coronary arteries can be performed with intracoronary infusion of low-dose gadolinium (Gd)-based contrast agent and assess the effect of long duration and multiple infusions on the image signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). ⋯ These studies demonstrated that, using intracoronary infusion of Gd, coronary magnetic resonance angiography (MRA) can be performed with high temporal resolution, and multiple low-dose slow infusions of Gd-based MR contrast agent can be performed without compromise of the vessel SNR and CNR.