Results 261 to 270 of about 6,916,372 (302)
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Cardiac function by magnetic resonance imaging
International Journal of Cardiac Imaging, 1988Gated magnetic resonance imaging of the heart displays cardiac structures with excellent resolution. This ability should be useful for assessment of cardiac physiology where acquisition of systolic and diastolic images is required. In this study, left ventricular ejection fraction was determined in 50 patients from oblique long axis views of the left ...
H J, Deutsch +5 more
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Use of Functional Magnetic Resonance Imaging
Neurosurgery Clinics of North America, 1996It has been the goal of this article to provide the reader with a brief background of fMRI, a basic understanding of the techniques of fMRI, and, more importantly, the potential for clinical and experimental studies using fMRI. In contrast to the limited number of installed PET and MEG units, the large installed base of MR imaging scanners (over 1000 ...
C C, Lee, C R, Jack, S J, Riederer
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Functional Magnetic Resonance Imaging of the Lung
Seminars in Respiratory and Critical Care Medicine, 2014Beyond being a substitute for X-ray, computed tomography, and scintigraphy, magnetic resonance imaging (MRI) inherently combines morphologic and functional information more than any other technology. Lung perfusion: The most established method is first-pass contrast-enhanced imaging with bolus injection of gadolinium chelates and time-resolved gradient-
J, Biederer +3 more
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The analysis of functional magnetic resonance images
Statistical Methods in Medical Research, 1997Functional magnetic resonance imaging (fMRI) is a powerful technique for measuring brain activity associated with the performance of different mental tasks. We briefly describe this technique and the images it produces and review methods of analysis that have been applied to fMRI data.
S, Rabe-Hesketh +2 more
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Functional magnetic resonance imaging: functional mapping
2012Abstract Blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI) is used primarily to identify the location of eloquent brain functions to spare during epilepsy surgery. Motor tapping yields robust identification of the primary motor cortex, and visual checkerboard stimuli identify primary visual cortex.
William D, Gaillard, Madison M, Berl
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Clinical Functional Magnetic Resonance Imaging
Cognitive and Behavioral Neurology, 2007To describe a new series of evaluation/procedural codes that were approved by the American Medical Association (AMA) CPT Editorial Panel for use in billing for these procedures by physicians or licensed clinical psychologists.As of January of 2007, 3 distinct CPT codes for billing related to the functional magnetic resonance imaging (fMRI) procedure ...
John, Hart, Stephen M, Rao, Marc, Nuwer
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A Primer on Functional Magnetic Resonance Imaging
Neuropsychology Review, 2007In this manuscript, basic principles of functional magnetic resonance imaging (fMRI) are reviewed. In the first section, two intrinsic mechanisms of magnetic resonance image contrast related to the longitudinal and transverse components of relaxing spins and their relaxation rates, T(1) and T(2), are described.
Gregory G, Brown +3 more
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Magnetic resonance imaging of brain function
Annals of Neurology, 1994New techniques for imaging of brain function are described, which utilize magnetic resonance imaging. Echo-planar imaging (EPI), the preferred method, is introduced and technical issues are discussed. Two recent approaches for measurement of blood flow are explained: contrast agent bolus tracking and black blood perfusion.
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Functional magnetic resonance imaging in children
Seminars in Pediatric Neurology, 1999Functional magnetic resonance imaging (fMRI) allows for the noninvasive mapping of the anatomical location of disparate functional brain activities. The means for carrying out fMRI involves the use of existing MR technology coupled with a special software image acquisition program or the use of a specially designed head coil.
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Functional Diffusion Magnetic Resonance Imaging
2018Functional diffusion magnetic resonance imaging (fDMRI) is a noninvasive technique that allows elucidating physiological and anatomical changes at a microscopic scale by detection of water molecular displacements in tissue structures. These displacements likely reflect microstructural changes associated with neuronal or glial cells activation.
Rita Maria Rocha, Oliveira +2 more
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