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Related Concept Videos

Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

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, evaluates...
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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...
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

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

Imaging Studies for Cardiovascular System II:Types of Echocardiography

Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
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 diagnosing...

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Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph
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Self-gated PROPELLER-encoded cine cardiac imaging.

Chi-Chung Wang1, Teng-Yi Huang

  • 1Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, ROC.

The International Journal of Cardiovascular Imaging
|November 2, 2011
PubMed
Summary

This study demonstrates self-gated cine cardiac imaging using PROPELLER encoding. This method detects motion from raw k-space data, eliminating the need for electrocardiography triggering or breath-holding.

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Technology

Background:

  • Cardiac and respiratory motion introduce artifacts in MRI.
  • Traditional cine cardiac imaging requires electrocardiography triggering and patient breath-holding, which can be challenging.

Purpose of the Study:

  • To develop a self-gated cine cardiac imaging technique using PROPELLER encoding.
  • To eliminate the need for electrocardiography triggering and breath-holding in cardiac MRI acquisition.

Main Methods:

  • Utilized the k-space center over-sampling property of PROPELLER encoding.
  • Detected cardiac and respiratory motion from raw k-space data.
  • Post-processed data by rearranging k-space data into cardiac and respiratory phase groups.
  • Combined PROPELLER blades from consistent phases to reconstruct high-resolution cine images.

Main Results:

  • Successfully detected cardiac and respiratory motion using PROPELLER raw k-space data.
  • Achieved self-gated cine cardiac imaging without electrocardiography triggering or breath-holding.
  • Reduced motion-related artifacts and k-space data discrepancies in reconstructed images.
  • Produced high-resolution cine images by combining motion-consistent PROPELLER blades.

Conclusions:

  • Self-gated cine cardiac imaging is feasible using PROPELLER encoding.
  • This technique offers a potentially practical alternative for cine cardiac imaging.
  • The method improves image quality by minimizing motion artifacts.