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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Registered Bioimaging of Nanomaterials for Diagnostic and Therapeutic Monitoring
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Compressive imaging in scattering media.

V Durán, F Soldevila, E Irles

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    Summary
    This summary is machine-generated.

    Scientists can now image objects in fog or tissue using structured light and a single-pixel detector. This noninvasive technique reconstructs images from light fluctuations, advancing medical diagnosis and remote sensing.

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    Area of Science:

    • Optics and Photonics
    • Biomedical Imaging
    • Sensing Technologies

    Background:

    • Imaging through turbid media like fog, smoke, or biological tissue presents a significant scientific challenge.
    • Applications in remote sensing and disease diagnosis necessitate improved methods for seeing through scattering environments.

    Purpose of the Study:

    • To develop a noninvasive technique for imaging absorbing objects completely embedded within scattering media.
    • To demonstrate the feasibility of reconstructing images using structured incoherent illumination and bucket detection.

    Main Methods:

    • Utilized structured incoherent illumination with low-intensity microstructured light patterns.
    • Employed bucket detection with a single-pixel detector to measure light fluctuations.
    • Leveraged compressive sensing strategies for accurate image reconstruction.

    Main Results:

    • Successfully reconstructed the image of a transilluminated target embedded in a scattering medium.
    • Experimentally validated the technique using holographic diffusers and a 6mm-thick chicken breast tissue sample.
    • Demonstrated a noninvasive imaging approach that avoids coherent sources, raster scanning, and time-gated detection.

    Conclusions:

    • The combined approach of structured illumination and bucket detection offers a novel solution for imaging in turbid media.
    • This technique holds promise for advancing noninvasive diagnostic tools and enhancing remote sensing capabilities.
    • The method's reliance on simple detection and incoherent light makes it potentially adaptable for various applications.