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Related Concept Videos

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 VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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 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,...

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Related Experiment Video

Updated: Jun 5, 2026

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging
11:13

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging

Published on: May 24, 2021

Cardiac Structural and Functional Evaluation Using a Heart Motion Correction Algorithm for Coronary Computed

Xiaorong Chen1, Yanping Dong1, Aiyun Sun2

  • 1Department of Medical Imaging, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, 321000 Jinhua, Zhejiang, China.

Reviews in Cardiovascular Medicine
|June 4, 2026
PubMed
Summary
This summary is machine-generated.

The second-generation snapshot freeze (SSF2) protocol enhances cardiac computed tomography angiography (CCTA) image quality and cardiac function assessment in patients with high heart rates. This advanced heart motion correction improves strain evaluation compared to standard methods.

Keywords:
coronary computed tomography angiographyheart segmentationmotion correctionstrain

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In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
08:13

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography

Published on: February 16, 2016

Related Experiment Videos

Last Updated: Jun 5, 2026

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging
11:13

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging

Published on: May 24, 2021

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
08:13

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography

Published on: February 16, 2016

Area of Science:

  • Cardiovascular Imaging
  • Medical Physics
  • Radiology

Background:

  • Current multi-slice computed tomography (CT) heart motion correction is adequate for coronary artery imaging in high heart rate patients.
  • The impact of these algorithms on whole-cardiac-cycle reconstruction image quality remains insufficiently understood.
  • This study evaluates a novel heart motion correction algorithm for coronary CT angiography (CCTA) in rapid heart rate scenarios.

Purpose of the Study:

  • To investigate the image quality of whole-cardiac-cycle reconstructions using a new heart motion correction algorithm.
  • To assess the segmentation performance and accuracy of cardiac structure and function evaluation.
  • To compare the novel algorithm against standard reconstruction protocols in patients with high heart rates.

Main Methods:

  • Retrospective analysis of 58 patients with heart rates ≥80 beats/min.
  • CT images reconstructed using standard (STD) and second-generation snapshot freeze (SSF2) protocols across the cardiac cycle (0-100% in 5% increments).
  • Comparison of image quality metrics, automatic segmentation accuracy (vs. manual contouring), and cardiac function parameters, including strain, with cardiac magnetic resonance (CMR) where available.

Main Results:

  • The SSF2 protocol demonstrated significantly higher image quality scores, steeper edge rise slopes, and lower entropy compared to STD (p < 0.01).
  • Excellent agreement was found between SSF2 automatic segmentation and manual contouring for left ventricular end-diastolic volume (ICC=0.96, CV=7.84%).
  • While SSF2 showed good correlation with CMR for global circumferential and longitudinal strain (ICC=0.90 and 0.85), statistically significant differences were noted.

Conclusions:

  • The SSF2 protocol significantly enhances image quality, cardiac structure, and function assessment in whole-cardiac-cycle CCTA reconstructions for high heart rate patients.
  • SSF2 provides superior performance over the STD protocol for evaluating myocardial strain.
  • This advanced algorithm facilitates more accurate cardiac assessment in challenging patient populations.