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Related Concept Videos

Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

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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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Imaging Studies for Cardiovascular System V: CT01:28

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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...
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Related Experiment Video

Updated: Apr 7, 2026

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging
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High-resolution variable-density 3D cones coronary MRA.

Nii Okai Addy1, R Reeve Ingle1, Holden H Wu2

  • 1Department of Electrical Engineering, Magnetic Resonance Systems Research Laboratory, Stanford University, Stanford, California, USA.

Magnetic Resonance in Medicine
|July 15, 2015
PubMed
Summary
This summary is machine-generated.

Variable-density 3D cones improve coronary MR angiography by achieving submillimeter isotropic resolution. This advanced technique enhances the depiction of coronary arteries with high temporal resolution.

Keywords:
3D conescoronary imagingparallel imagingtrajectory design

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Area of Science:

  • Cardiovascular Imaging
  • Magnetic Resonance Imaging (MRI)

Background:

  • Whole-heart coronary MR angiography (MRA) aims to improve spatial and temporal resolution for better visualization.
  • Current techniques face limitations in achieving high resolution without compromising scan time or image quality.

Purpose of the Study:

  • To develop a variable-density (VD) 3D cones acquisition for whole-heart coronary MRA.
  • To enhance spatial/temporal resolution using parallel imaging and compressed sensing.

Main Methods:

  • A VD 3D cones trajectory combining radial and spiral undersampling was designed.
  • Achieved 0.8 mm/66 ms isotropic spatial/temporal resolution, comparable to previous 1.2 mm/100 ms scans.
  • Employed non-Cartesian L1-ESPIRiT for high-resolution image reconstruction in volunteers and patients.

Main Results:

  • L1-ESPIRiT reconstruction significantly reduced noise in high-resolution scans compared to gridding.
  • 0.8 mm images showed improved vessel sharpness in the right and left anterior descending arteries versus 1.2 mm images.
  • VD 3D cones maintained signal-to-noise and contrast-to-noise ratios effectively.

Conclusions:

  • VD 3D cones enable coronary MRA with isotropic submillimeter spatial and high temporal resolution.
  • This technique improves the depiction of coronary arteries.
  • Offers a promising approach for advanced cardiovascular imaging.