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Related Concept Videos

Computed Tomography01:10

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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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Imaging Studies I: CT and MRI01:14

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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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Computed Tomography (CT) scan:
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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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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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Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
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Positron Emission Tomography01:29

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
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X-ray source translation based computed tomography (STCT).

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    This study introduces multi-scanning CT (mSTCT), a novel imaging technique that overcomes limitations of traditional micro computed tomography (µCT) for large objects. mSTCT enables high-resolution, artifact-free imaging and precise region of interest visualization.

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    Area of Science:

    • Physics
    • Engineering
    • Medical Imaging

    Background:

    • Micro computed tomography (µCT) provides high-resolution 3D imaging but faces challenges with large objects due to detector size limitations.
    • Current rotating CT (RCT) systems struggle with imaging large objects at high resolutions, primarily due to the difficulty in fabricating large, cost-effective flat-panel detectors.

    Purpose of the Study:

    • To propose and validate a novel source translation-based CT (STCT) method for high-resolution imaging of large objects.
    • To address data incompleteness in STCT by developing multi-scanning STCT (mSTCT) for accurate 3D reconstructions.
    • To demonstrate the potential of mSTCT for imaging regions of interest (ROIs) within objects, overcoming limitations of RCT.

    Main Methods:

    • Introduced source translation-based CT (STCT) where field of view is determined by source translation distance, circumventing detector size constraints.
    • Developed multi-scanning STCT (mSTCT) to acquire complete projection data theoretically required for accurate reconstruction.
    • Conducted theoretical, numerical simulations, and established an experimental platform to validate mSTCT performance.

    Main Results:

    • Theoretical and numerical studies confirmed mSTCT's capability for accurate, artifact-free imaging of large objects.
    • Numerical simulations showed mSTCT can precisely image the region of interest (ROI) within objects, a challenge for RCT with truncated projections.
    • Experimental results from the mSTCT platform demonstrated its feasibility for µCT applications, showing successful 2D and 3D reconstructions.

    Conclusions:

    • mSTCT offers a viable solution for high-resolution, artifact-free micro computed tomography of large objects.
    • The technique shows significant potential for applications beyond µCT, including security inspection and product screening, due to its low-cost equipment and high-speed capabilities.
    • mSTCT overcomes critical limitations of existing CT systems, enabling advanced imaging of large-scale structures and internal details.