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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.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Ultrasonography01:17

Ultrasonography

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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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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Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
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Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
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Related Experiment Video

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An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging
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Compressed sensing for ultrasound computed tomography.

Ruud van Sloun, Ashish Pandharipande, Massimo Mischi

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    Summary

    Compressed sensing significantly reduces ultrasound computed tomography (UCT) acquisition time by nearly 10x. This novel approach enhances imaging speed without compromising spatial resolution for quantitative tissue analysis.

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    Area of Science:

    • Medical imaging
    • Biomedical engineering
    • Quantitative ultrasound

    Background:

    • Ultrasound computed tomography (UCT) reconstructs quantitative tissue properties like speed of sound, density, and attenuation.
    • Current UCT acquisition times are limited by physical constraints, hindering clinical application.
    • Reducing acquisition time is crucial for broader UCT adoption.

    Discussion:

    • A compressed sensing approach using concurrent randomized transmissions in a circular array is proposed.
    • This method employs compressed acquisitions to accelerate data collection.
    • The reconstruction combines the born iterative method with total variation minimization, leveraging image sparsity.

    Key Insights:

    • The proposed randomized transmission scheme outperforms uniform undersampling in UCT.
    • Acquisition time can be reduced by nearly an order of magnitude.
    • High spatial resolution is maintained despite the significant reduction in acquisition time.

    Outlook:

    • This technique offers a pathway to faster, more efficient UCT imaging.
    • Potential for improved diagnostic capabilities through rapid quantitative tissue characterization.
    • Further validation in diverse clinical scenarios is warranted.