Magnetic resonance imaging (MRI) utilizes the signal induced by excited spins when human tissue is subjected to a uniform magnetic field. The individual magnetic moments of the nuclear spins in the ti...
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Current MRI techniques to obtain images of rapidly changing anatomies such as the beating heart or to monitor the flow of fluids such as contrast agents through organs and peripheral vasculature acqui...
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Fat quantification using magnetic resonance imaging (MRI) has important clinical applications including the early diagnosis and quantitative staging of non-alcoholic fatty liver disease (NAFLD). Compa...
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Mapping of effective transverse relaxation rate (R2*) relaxivity has important applications in magnetic resonance imaging (MRI) including blood oxygenation level dependent functional imaging, detectio...
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Current MRI techniques to obtain images of rapidly changing anatomies such as the beating heart or to monitor the flow of fluids such as contrast agents through organs and peripheral vasculature acqui...
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UW–Madison researchers have previously developed “IDEAL,” a multi-echo chemical species separation technique that uses iterative decomposition of water and fat with echo asymmetry and least squa...
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Magnetic resonance imaging (MRI) is highly sensitive to patient motion. Depending on the k-space acquisition trajectory, which determines at what positions of the spatial frequency domain data points ...
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Quantifying the amount of fat in the liver is crucial for the detection of non-alcoholic fatty liver diseases including steatosis, fibrosis, cirrhosis and liver failure.  Accurate fat measurements ca...
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Magnetic resonance imaging (MRI) is a medical imaging technique that takes measurements, or “views,” of a subject’s nuclear magnetic resonance (NMR) to form images of internal structures.  Magn...
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Magnetic resonance (MR) has been utilized largely for medical diagnostic applications, but recent advancements have allowed it to replace many previously performed X-ray examinations.  Even more rece...
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Magnetic resonance imaging (MRI) is used to measure nuclear magnetic resonance (NMR) from various substances in human tissue to produce medical images for qualitative and quantitative assessments.  T...
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Nuclear magnetic resonance is the property of magnetic nuclei used in medical imaging techniques like MRI to produce images. The nuclear magnetic resonance of water is known to be dependent on tempera...
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Magnetic resonance (MR) has been utilized largely for medical diagnostic applications, but recent advancements have allowed it to replace many previously performed X-ray examinations. Even more recent...
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Diagnosis of lung disease, such as emphysema, typically is made using whole lung pulmonary function tests to characterize airway obstruction and diffusion abnormalities.  Breath-hold high speed X-ray...
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Recent advances have started to permit the use of magnetic resonance (MR), instead of the more common X-ray technique, for medical monitoring and control of certain therapeutic procedures, otherwise k...
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In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
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In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
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Phase contrast magnetic resonance imaging (PC MRI) can be used to improve diagnostic accuracy of vascular, musculoskeletal and cerebrospinal exams. PC MRI functions by receiving a signal emitted by th...
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In imaging technologies, signal-to-noise ratio (SNR) is a quantitative measure of image quality. In medical imaging specifically, as SNR decreases, it becomes increasingly difficult to differentiate b...
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Chemical shift-based multi-echo water-fat separation methods are used increasingly in MRI clinical applications to distinguish between water and fat nuclear magnetic resonance (NMR) signals. Water and...
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MRI systems have played a major part in safely imaging and diagnosing various bodily ailments.  When human tissue is subjected to a uniform magnetic field from a large magnet, it will vibrate at what...
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Angiographic exams are typically interested in the arterial vasculature and not in fat or other static background tissues. To remove background tissue during contrast-enhanced magnetic resonance angio...
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Although detecting high-frequency magnetic fields is important in MRI, NMR and magnetic resonance force microscopes, it is more difficult to design magnetic field sensors at high frequencies (greater ...
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Magnetic resonance imaging (MRI) of heart tissue viability and function typically includes a step in which the inversion time (TI) is set so that the signal from normal heart tissue is suppressed in t...
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Chiari malformation is a birth defect that occurs in approximately 1 in 2,000 births. In this disorder, part of the cerebellum (the tonsils) descends into the opening at the base of the skull through...
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