Related Experiment Video
Updated: Jul 20, 2026
06:39
Ultrasound Based Assessment of Coronary Artery Flow and Coronary Flow Reserve Using the Pressure Overload Model in Mice
Published on: April 13, 2015
Characterizing coronary motion and its effect on MR coronary angiography--initial experience
Osama Al-Kwifi1, Jeffrey Stainsby, Warren D Foltz
1Imaging Research Program, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario, Canada. osama@sten.sunnybrook.utoronto.ca
Journal of Magnetic Resonance Imaging : JMRI
|August 25, 2006
Summary
Individual coronary artery motion varies significantly, necessitating a prescan characterization. Optimizing scan settings before data acquisition is crucial for achieving high-resolution coronary images.
Area of Science:
- Medical Imaging
- Cardiovascular Imaging
- Biomedical Engineering
Background:
- Coronary artery motion presents challenges for high-resolution imaging.
- Accurate imaging is vital for diagnosing and monitoring cardiovascular conditions.
Purpose of the Study:
- To characterize coronary artery motion for prescan optimization.
- To determine optimal scan settings for high-resolution coronary imaging.
Main Methods:
- Utilized 2D real-time scans to image coronary arteries under breath-holding and free-breathing.
- Measured motion displacement along three axes and used computer simulations.
- Estimated point-spread functions for various acquisition strategies (real-time, cardiac-gated, respiratory-gated).
Main Results:
- Significant inter-individual variations in coronary motion were observed.
- Lower heart rates (HR) and longer breath-holds improved spatial resolution.
- Determined optimal slices per heart cycle to minimize distortion.
Conclusions:
- Prescan coronary-motion characterization is essential for individual optimization.
- Optimized scan parameters enhance the quality of coronary images.
- This approach improves the diagnostic accuracy of cardiovascular imaging.
Related Concept Videos
01:28Imaging 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...
01:30Acute 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...
01:21Imaging 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,...
01:25Imaging 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...
01:24Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...