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Related Concept Videos

Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

448
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...
448
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.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
814

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Related Experiment Video

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Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph
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Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph

Published on: February 21, 2025

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Prospective cardiac motion self-gating.

Fei Han1, Stanislas Rapacchi1, Peng Hu1,2

  • 1Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, CA, USA.

Quantitative Imaging in Medicine and Surgery
|May 19, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a novel cardiac self-gating MRI technique. It accurately captures cardiac motion in real-time, offering a robust alternative to traditional ECG-gating for cardiac imaging.

Keywords:
Cardiac MRImotion correction using multiple coil array (MOCCA)principal component analysis (PCA)prospective gatingself-gating

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Area of Science:

  • Cardiovascular Magnetic Resonance Imaging
  • Medical Imaging Technology
  • Biomedical Engineering

Background:

  • Conventional electrocardiogram (ECG)-gating in cardiac MRI can be challenging due to signal interference and patient variability.
  • Developing real-time, robust cardiac motion triggering is crucial for improving MRI scan efficiency and accuracy.
  • Accurate cardiac gating is essential for high-quality functional assessment in cardiovascular magnetic resonance imaging (CMR).

Purpose of the Study:

  • To develop and validate a prospective cardiac motion self-gating method for real-time cardiac trigger acquisition.
  • To assess the accuracy and reliability of the proposed self-gating technique compared to ECG-based methods.
  • To evaluate the image quality of prospectively self-gated cardiac CINE sequences.

Main Methods:

  • A novel self-gating technique was developed, utilizing an "imaging mode" and a "self-gating mode" that samples k-space centerline.
  • Principal Component Analysis (PCA) was employed to process self-gating data, using the first principal component as the gating signal.
  • Retrospective and prospective studies were conducted on healthy subjects to validate trigger accuracy and compare image quality with ECG-gating.

Main Results:

  • The self-gating method achieved ±10 ms accuracy compared to ECG triggers in retrospective studies.
  • Prospectively applied self-gating successfully detected 100% of cardiac triggers.
  • Excellent cardiac CINE image quality was obtained using the self-gating method without ECG signals.

Conclusions:

  • The developed cardiac self-gating method provides a robust and accurate alternative to conventional ECG-based gating.
  • This technique holds promise for various cardiac MRI applications, enhancing image acquisition efficiency.
  • Self-gating offers a reliable solution for cardiac trigger detection, simplifying MRI procedures.