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Related Concept Videos

Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

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Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
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Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for...
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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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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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Related Experiment Video

Updated: Jul 16, 2025

Transthoracic Speckle Tracking Echocardiography for the Quantitative Assessment of Left Ventricular Myocardial Deformation
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Higher Order Singular Value Decomposition Filter for Contrast Echocardiography.

Geraldi Wahyulaksana, Luxi Wei, Jason Voorneveld

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    |September 18, 2023
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel method using higher-order singular value decomposition (HOSVD) to improve contrast agent visibility in echocardiography, enhancing coronary circulation assessment. The technique significantly boosts contrast-to-background ratio for clearer cardiac imaging.

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    Area of Science:

    • Medical Imaging
    • Cardiovascular Ultrasound
    • Signal Processing

    Background:

    • Contrast-enhanced echocardiography is clinically relevant for coronary circulation assessment but limited by poor image quality.
    • Current methods like multipulse contrast schemes (MPCSs) and singular value decomposition (SVD) filters struggle with motion and propagation artifacts, hindering contrast agent visibility in the myocardium.

    Purpose of the Study:

    • To develop and evaluate a novel signal processing scheme using higher-order SVD (HOSVD) for amplitude modulation/amplitude-modulated pulse inversion (AM/AMPI) echoes.
    • To improve contrast detection and image quality in contrast-enhanced echocardiography compared to existing techniques.

    Main Methods:

    • Proposed a processing scheme employing HOSVD on AM/AMPI echoes, treating complementary pulse echoes as a separate dimension.
    • Implemented a method to remove tissue scattering signals by rank reduction in the HOSVD algorithm for enhanced contrast detection.
    • Conducted in vitro flow phantom and in vivo porcine heart experiments to compare the proposed HOSVD method with conventional AM and SVD filters.

    Main Results:

    • In vitro studies demonstrated that HOSVD on AM pulsing achieved a higher contrast-to-background ratio (CBR) than conventional AM (10 dB higher) and SVD filter (14 dB higher).
    • In vivo porcine heart experiments showed HOSVD improved CBR by up to 19 dB in open-chest acquisitions compared to AM.
    • HOSVD also improved contrast ratio (CR) by 3 dB in closed-chest acquisitions.

    Conclusions:

    • The proposed HOSVD processing scheme significantly enhances contrast agent detection and image quality in echocardiography.
    • This method offers a promising advancement for routine clinical assessment of coronary circulation using contrast-enhanced ultrasound.
    • HOSVD provides superior performance over conventional methods, addressing key limitations in current clinical tools.