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. Compu...
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Computed tomography (CT) systems are used for medical imaging and produce images by measuring the loss in an X-ray beam’s strength. These measurements are used to reconstruct an image in 2-D or 3-D...
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In 2-D medical imaging, a pulse sequence called inversion recovery (IR) can be used to obtain multiple images of an area with varying magnetization contrast. This helps improve diagnostic certainty. D...
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Inversion recovery (IR) techniques commonly are used in MRI either to null signals or increase signal contrast between tissues. In the process, different types of radiofrequency pulses are followed by...
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Magnetic resonance (MR) imaging technology is used to measure nuclear magnetic resonance (NMR) from various substances in human tissue to produce medical images for qualitative and quantitative assess...
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The problem of constructing a set of points uniformly distributed across the surface of a sphere dates to the early 20th century. The problem is of great importance to modern biomedical imaging and ma...
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Since the introduction of angiography, there have been many attempts to develop techniques that provide diagnostic images of the vasculature while reducing invasiveness.A technique called 4-D DSA (dig...
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In magnetic resonance imaging (MRI), the amount of data required to reconstruct an image can be decreased using ‘partial k-space’ sampling. This type of sampling enables shorter breath-holds, redu...
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Assessing treatment response in cancer patients is essential to manage their disease and evaluate therapy. Computed tomography (CT) is widely used to monitor cancer treatment by measuring changes in t...
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Magnetic resonance spectroscopy (MRS) provides a noninvasive means of discovering and quantifying chemical compounds within an area of interest like the brain. The underlying principle is that the ato...
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Magnetic resonance parametric mapping is a general framework for measuring important biomarkers. In the process, several images from the same field of view are obtained using different acquisition par...
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The outcome of a stroke can hinge on the time spent on diagnosis and intervention. Perfusion imaging is a critical step in the process, wherein a patient is scanned to identify salvageable tissue. The...
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Interventional medical procedures can be performed less invasively, and more safely, when guided by magnetic resonance imaging (MRI). Placing devices like catheters, guidewires and stents using MRI gu...
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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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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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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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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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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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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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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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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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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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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 appl...
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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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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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