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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...

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Related Experiment Video

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High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals
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k-t-Space accelerated myocardial perfusion.

Bernd Jung1, Matthias Honal, Jürgen Hennig

  • 1Department of Diagnostic Radiology, Medical Physics, University Hospital, Freiburg, Germany. bernd.jung@uniklinik-freiburg.de

Journal of Magnetic Resonance Imaging : JMRI
|October 31, 2008
PubMed
Summary

Parallel MRI with extended and averaged generalized autocalibrating partially parallel acquisitions (PEAK-GRAPPA) significantly enhances myocardial perfusion imaging quality. This technique preserves temporal fidelity at high acceleration factors, outperforming conventional GRAPPA.

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Last Updated: Jun 28, 2026

High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals
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Published on: December 16, 2022

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 MRI
  • Medical Imaging Techniques
  • Parallel Imaging

Background:

  • Myocardial perfusion imaging is crucial for diagnosing heart conditions.
  • Accelerated MRI techniques are needed to improve scan efficiency.
  • Conventional parallel imaging methods can sometimes compromise image quality.

Purpose of the Study:

  • To evaluate the performance of PEAK-GRAPPA for myocardial perfusion MRI.
  • To compare PEAK-GRAPPA with conventional GRAPPA and fully sampled data.
  • To assess image quality and temporal fidelity at accelerated scan rates.

Main Methods:

  • 11 patients with myocardial infarction underwent perfusion MRI.
  • Scans were reconstructed using nonaccelerated data, conventional GRAPPA, and PEAK-GRAPPA.
  • Net acceleration factors ranged from 2.4 to 3.4.
  • Signal time courses were analyzed to assess contrast agent passage.

Main Results:

  • PEAK-GRAPPA yielded significantly improved image quality over conventional GRAPPA.
  • Signal time courses from PEAK-GRAPPA closely matched fully sampled data.
  • This agreement is essential for accurate myocardial perfusion assessment.

Conclusions:

  • PEAK-GRAPPA maintains temporal fidelity for myocardial perfusion up to acceleration factors >3.
  • The technique offers superior image quality compared to conventional GRAPPA.
  • PEAK-GRAPPA is a promising method for accelerated myocardial perfusion MRI.