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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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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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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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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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Axially extended-volume C-arm CT using a reverse helical trajectory in the interventional room.

Zhicong Yu, Andreas Maier, Gunter Lauritsch

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    |August 29, 2014
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    C-arm computed tomography (CT) imaging can now cover longer objects using a novel reverse helical trajectory. This advancement in C-arm CT technology improves interventional imaging capabilities for complex vascular and spinal procedures.

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    Area of Science:

    • Medical Imaging
    • Interventional Radiology
    • Computed Tomography

    Background:

    • C-arm computed tomography (CT) offers 3-D imaging from 2-D X-ray projections, enhancing interventional efficacy and safety.
    • Current C-arm CT systems use circular scans, limiting axial coverage and posing challenges for imaging long structures like the aorta or spine.

    Purpose of the Study:

    • To develop and validate an axially extended-volume C-arm CT technique for imaging long objects.
    • To overcome the axial coverage limitations of conventional C-arm CT systems in interventional settings.

    Main Methods:

    • Development of a novel calibration method for C-arm systems.
    • Implementation and assessment of a reverse helical trajectory for data acquisition.
    • Creation of a reconstruction algorithm tailored for reverse helical C-arm CT data.
    • Quantitative evaluation of image quality and geometric repeatability.

    Main Results:

    • Demonstrated feasibility of implementing and reliably repeating a reverse helical trajectory on a multiaxis C-arm system.
    • Successfully reconstructed long-volume images with satisfactory image quality using reverse helical data.

    Conclusions:

    • The reverse helical trajectory is a viable method for achieving axially extended-volume C-arm CT in the interventional room.
    • This technique significantly expands the imaging capabilities of C-arm CT for complex anatomical regions.