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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The HYPR method, as described in WARF reference number P06088US, reconstructs a composite image from acquired data to provide a priori knowledge of the subject being imaged. This composite image then ...
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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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The HYPR method, as described in WARF reference number P06088US, reconstructs a composite image from acquired data to provide a priori knowledge of the subject being imaged. This composite image then ...
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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 ...
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Elastography is an acoustical imaging method used to estimate the elastic properties of soft tissue by assessing the tissue in different states of compression. Tissue that exhibits less strain under c...
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Ultrasound-based elasticity imaging is used in medicine for non-invasive analysis of tissue movement and displacement. These types of techniques determine how tissue moves in response to pressure, muc...
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Elastography is a new ultrasound imaging technique that detects and images the stiffness properties, or strain, of tissues under compression. This new modality can reveal disease properties of tissue ...
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Although stroke afflicts more than 700,000 people in the United States annually, the only FDA-approved clinical treatment is intravenous administration of tissue plasminogen activator (tPA) within thr...
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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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Ultrasound scanners transmit an ultrasonic signal into a patient and then receive and analyze an echo signal from the patient’s tissue. In conventional gray scale imaging, the most widely used m...
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Elastography is a new ultrasound imaging technique that detects and images the local stiffness properties of tissues under compression. Elastrography promises to improve the diagnosis of several uteri...
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Position emission tomography (PET) plays a vital role in the diagnosis of health and disease. The long-lived isotope iodine-124 (I-124; half-life 4.2 days) has many features that make it an attractive...
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X-ray mammography is currently the most effective method for detecting early-stage breast cancer; however, mammography suffers from relatively high false positive and false negative rates, requires pa...
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Ultrasound-based elasticity imaging uses signals from conventional diagnostic ultrasound systems to show the mechanical properties of tissue (e.g., stiffness or Poisson’s ratio). In quasi-static...
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Microwave-based imaging methods, which exploit the contrast in dielectric properties between normal and malignant tissue, offer a promising alternative to ultrasound and X-ray techniques for imaging b...
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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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Most commercially available computed tomography (CT) systems employ image reconstruction methods based on the concepts of Radon space and the Radon transform. When a CT X-ray source projects a single ...
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Phase contrast (PC) MRI studies are advantageous because they don’t require a contrast agent and can provide quantitative information on blood flow. However, if blood velocity exceeds the maximu...
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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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Vastly Under-sampled Isotropic Projection Reconstruction (VIPR) is a magnetic resonance imaging (MRI) data acquisition technique that provides high resolution images at speeds up to 30 times faster th...
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UW-Madison researchers previously developed a novel imaging technique for detecting breast cancer (see WARF reference number P01386US). This technique makes use of the sharp contrast in dielectric pro...
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