Computed tomography (CT) uses special X-ray equipment to obtain image data from different angles of the body and generate a cross-sectional image of body tissues and organs. Because CT is a non-invasi...
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Ultrasonic elastography reveals disease properties of tissue that go undetected with conventional ultrasound. It accomplishes this by imaging the stiffness properties, or strain, of tissues under comp...
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The Feldkamp (FDK) algorithm is widely used for image reconstruction for cone-beam projections, which are utilized in three-dimensional computed tomography (CT). However, because current FDK-type algo...
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Before, after, and during radiation therapy, images of the patient are generated to ensure that radiation is delivered to the tumor site’s precise location. Instruments known as portal imaging devic...
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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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Measurements of emission and absorption spectra provide a valuable means of identifying and analyzing gases, liquids and solids. Fourier transform infrared (FTIR) and grating spectrometers are two com...
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In magnetic resonance systems, individual phased-array coils each sense a signal from a different part of the body. A composite image is then formed using an algorithm. Although parallel imaging can b...
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Elastography is an acoustical imaging method used to estimate the elastic properties, or stiffness, of soft tissue by assessing the tissue in different states of stress or compression. Tissue that exh...
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Terahertz (THz) radiation holds tremendous potential for applications ranging from medical imaging technology to security and public safety. So far, the use of THz radiation beams has been limited by ...
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Non-Cartesian imaging in magnetic resonance imaging (MRI), often accomplished by radial or spiral data acquisition, permits significant acceleration of the MRI process. However, non-Cartesian imaging ...
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Magnetic resonance imaging (MRI) is a diagnostic imaging technique that is especially effective for soft tissues such as the brain or other organs.  To produce an MR image the patient is subjected to...
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Magnetic resonance imaging (MRI) is a diagnostic imaging technique that is especially effective for soft tissues such as the brain or other organs.  To produce an MR image the patient is subjected to...
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Magnetic resonance imaging (MRI) systems apply a magnetic field to excite the proton nuclei in human tissue, which then emit a nuclear magnetic resonance (NMR) signal.  This signal is received by the...
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Breast cancer is the second most commonly diagnosed cancer in women.  Currently in the U.S., 2.4 million women have been diagnosed and treated for breast cancer.  The most common method of detecting...
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Magnetic resonance imaging (MRI) is a medical imaging technique that measures the nuclear magnetic resonance (NMR) to image internal parts of the body.  One method used to reconstruct images from NMR...
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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.  Diff...
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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.  Func...
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Magnetic resonance spectroscopy (MRS) is a technique that measures a subject’s nuclear magnetic resonance (NMR) to produce spectra of its tissue components.  In medical diagnosis and treatment, it ...
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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.  The ...
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Preterm birth is a major world health problem that results in significant infant deaths and medical conditions at a cost of $26 billion annually in the U.S. alone.  Preterm birth rates have increased...
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Systems based on terahertz (THz) radiation technology show promise for communication and imaging applications.  These systems can penetrate through many materials and are sensitive enough to resonate...
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Phsyicians often use microscopic visual inspection followed by biopsy to detect cancer; however, this method is limited in many ways. Optical techniques are a promising alternative that allows clinici...
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Biomedical imaging allows physicians to detect the onset of disease, injury and other disorders at an early stage, and to monitor their progression.
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One problem associated with intensity modulated radiation therapy (IMRT) is that the precise position, shape and size of the target often changes between the time the plan was developed and the actual...
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As use of real-time diagnostic ultrasound scanning has increased, work-related injury has become epidemic among medical sonographers and echocardiographers. Approximately 80 percent of sonographers re...
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