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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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Imaging Studies VII: Vascular Imaging01:19

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Imaging Studies for Cardiovascular System V: CT01:28

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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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Imaging Studies III: Computed Tomography01:27

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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 for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

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Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
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Imaging Studies for Cardiovascular System IV: CMRI01:21

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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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Related Experiment Video

Updated: Mar 23, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
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Optical Coherence Tomography Angiography Using the Optovue Device.

David Huang, Yali Jia, Simon S Gao

    Developments in Ophthalmology
    |March 30, 2016
    PubMed
    Summary
    This summary is machine-generated.

    The Optovue AngioVue system uses the split-spectrum amplitude-decorrelation angiography (SSADA) algorithm for faster optical coherence tomography (OCT) angiography. This technology enables quantitative analysis of retinal vasculature, aiding in disease diagnosis and monitoring.

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    Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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    Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

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    Area of Science:

    • Ophthalmology
    • Medical Imaging
    • Biomedical Engineering

    Background:

    • Optical coherence tomography (OCT) angiography is crucial for visualizing retinal vasculature.
    • Existing OCT angiography methods face challenges with scanning time and motion artifacts.
    • The Optovue AngioVue system aims to address these limitations.

    Purpose of the Study:

    • To describe the technology behind the Optovue AngioVue system for OCT angiography.
    • To explain the split-spectrum amplitude-decorrelation angiography (SSADA) algorithm.
    • To highlight the quantitative analysis capabilities of the system for retinal vascular assessment.

    Main Methods:

    • The Optovue AngioVue system utilizes the SSADA algorithm for OCT angiography.
    • SSADA processes OCT signals by splitting them into spectral bands to enhance flow detection.
    • The algorithm minimizes scanning time and rejects axial bulk motion noise.

    Main Results:

    • The SSADA algorithm increases usable image frames by splitting OCT images into spectral bands.
    • Quantitative metrics such as flow area, non-flow area (ischemic regions), and flow density are provided.
    • These metrics can be used for comparative analysis within and across studies.

    Conclusions:

    • The Optovue AngioVue system with SSADA offers efficient and quantitative OCT angiography.
    • The system's metrics serve as potential biomarkers for diagnosing and monitoring retinal vascular diseases.
    • Quantitative analysis of retinal vasculature aids in tracking disease progression and treatment response.