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102 Results for 'MRI'
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Technology
Single-Shot Vascular MR Imaging Without Contrast Agent
Acquiring diagnostic images of a patient’s vasculature can be difficult and time consuming. Some magnetic resonance imaging (MRI) techniques employ contrast-enhancing agents, such as gadolinium, tha...
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Frank Korosec, James Holmes, Mahdi Rahimi, Daniel Litwiller | P130045US01
Technology
Detecting Iron Overload with MRI
Iron is an essential nutrient for the human body but is toxic in excess. Iron overload is a particular hazard to patients requiring regular blood transfusions. Treatment for patients with iron overloa...
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Scott Reeder, Diego Hernando Arribas | P120356US01
Technology
Cardiac Image Reconstruction with Improved Temporal Resolution
Visualizing a patient’s heart by non-invasive cardiovascular imaging is a powerful tool for diagnosis and therapy. Yet the heart’s movement and small branching arteries make quality cardiac imagin...
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Guang-Hong Chen, Jie Tang | P09268US
Technology
Better MRI Performance with Improved 3-D UTE Imaging
MRI produces medically valuable images of a patient’s internals using magnetic fields and pulses that align and excite nuclei. The signals emitted by excited nuclei can be measured in ‘k-space’ ...
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Kevin Johnson | P120255US01
Technology
Accelerated MRI Scanning Using Spectral Sensitivity
Magnetic resonance imaging (MRI) of metallic implants can be challenging because metal and surrounding tissue impact the main magnetic field differently. Such magnetic field inhomogeneities cause off-...
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Scott Reeder, Matthew Smith, Nathan Artz | P120310US01
Technology
Correcting for Patient Motion with T1-Weighted PROPELLER MRI
A leading method for reducing motion blurring in medical imaging is called PROPELLER (Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction). It allows doctors to track and help...
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Howard Rowley, Jean Brittain, James Holmes, Reed Busse, Ajeetkumar Gaddipati, Philip Beatty, Xiaoli Zhao, Zhiqiang Li | P110244US02
Technology
Faster, Better Quality Medical Imaging by Constrained Reconstruction
Quantitative magnetic resonance imaging (qMRI) is a clinical procedure that can yield imaging biomarkers more sensitive and specific to underlying disease than regular MRI. It works by fitting images ...
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Alexey Samsonov, Julia Velikina | P120280US01
Technology
MRI Water-Fat Separation with Full Dynamic Range Using In-Phase Images
Chemical shift-based multi-echo water-fat separation methods have seen increased use in routine magnetic resonance imaging (MRI) clinical applications. These methods involve collecting multiple echoes...
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Scott Reeder, Diego Hernando Arribas | P120173US01
Technology
Eliminating Encoding Distortion in MRI for Clarity in the Presence of Metal
Visualizing a body’s internal structures by MRI is an essential clinical practice. Yet acquiring images in the presence of metal, like the steel screws of an implant, remains challenging because of ...
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Scott Reeder, Nathan Artz | P120191US01
Technology
Brain and Deep Tissue Visualization by Diffusion Tensor Imaging
Elucidating the workings and development of the brain remains a fertile topic of investigation and one reliant on non-invasive visualization technology like magnetic resonance imaging (MRI).
As app...
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M. Elizabeth Meyerand, Konstantinos Arfanakis | P01404US
Technology
Quantifying Visceral Fat Using MRI
An excess of visceral adipose tissue (VAT), or fat stored in the abdomen, is known to be a dominant risk factor in developing metabolic syndrome, the not fully understood clustering of metabolic and c...
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Scott Reeder, Aziz Poonawalla | P110294US01
Technology
Deterministic Approach to Generating Optimal Ordering of MRI Measurements
Generating a set of uniformly-distributed points on the surface of a sphere via a deterministic scheme is important for biomedical imaging and engineering applications, especially MR imaging. A point ...
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Cheng Koay, Samuel Hurley | P110109US01
Technology
Improved MRI Scan Time through Rotating Angle Velocity Encoding
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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Pablo Irarrazaval | P110117US01
Technology
Magnetic Resonance Dynamic Imaging Sequence for Accelerated Pseudo-Random Data Magnetic Resonance Imaging
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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Kang Wang, Reed Busse, Frank Korosec, Philip Beatty, James Holmes | P100220US03
Technology
Method for Error-Compensated Chemical Species Signal Separation with Magnetic Resonance Imaging
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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Diego Hernando Arribas | P110134US01
Technology
Method for Quantification of R2 Relaxivity in Magnetic Resonance Imaging
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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Scott Reeder, Diego Hernando Arribas | P110135US01
Technology
Accelerated Pseudo-Random Data Magnetic Resonance Imaging
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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Kang Wang, Reed Busse, Frank Korosec, Philip Beatty, James Holmes | P100220US04
Technology
Improved Images with MRI Acquisition of Multiple Chemical Species
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 an...
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Walter Block, Catherine Moran, Scott Reeder, Ethan Brodsky | P100217US01
Technology
Method to Reconstruct Motion-Compensated Magnetic Resonance Images with Non-Cartesian Trajectories
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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Alexey Samsonov, Ashley Anderson III, Julia Velikina | P110008US01
Technology
More Accurate Methods for Detecting and Quantifying Fat from Magnetic Resonance Images
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 measurement...
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Scott Reeder, Huanzhou Yu | P07150US
Technology
Image Reconstruction Method for Cardiac Gated Magnetic Resonance Imaging
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 struct...
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Charles Mistretta | P06132US
Technology
Multi-Mode Medical Tracking and Visualizing System for MR Guided Interventional Procedures
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 ...
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Orhan Unal, Krishna Kurpad | P05330US
Technology
Magnetic Resonance Imaging Diffusion Weighted Preparatory Sequence to Remove Patient Motion Effects
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.&nbs...
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Scott Reeder, Reed Busse, Jean Brittain | P07066US
Technology
Non-Invasive Magnetic Resonance Thermometry in the Presence of Water and Fat
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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Scott Reeder, Brian Soher | P07433US02
Technology
Method for Improved Fat-Water Signal Separation in Phase Contrast Magnetic Resonance Imaging
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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Kevin Johnson, Alexey Samsonov | P08394US02