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Related Experiment Video

Updated: Jun 16, 2026

Cardiac Magnetic Resonance Imaging at 7 Tesla
09:14

Cardiac Magnetic Resonance Imaging at 7 Tesla

Published on: January 6, 2019

Three dimensional echo-planar imaging at 7 Tesla.

B A Poser1, P J Koopmans, T Witzel

  • 1Erwin. L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany. benedikt.poser@donders.ru.nl

Neuroimage
|February 9, 2010
PubMed
Summary
This summary is machine-generated.

Three-dimensional echo-planar imaging (3D EPI) offers a viable alternative to 2D EPI for functional MRI (fMRI) at 7 Tesla, especially for high-resolution, whole-brain scans.

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Area of Science:

  • Radiology
  • Neuroimaging
  • Magnetic Resonance Imaging

Background:

  • Functional MRI (fMRI) commonly uses 2D echo-planar imaging (EPI).
  • Ultra-high field strengths (7T) benefit from high-resolution imaging, where 2D EPI faces limitations like long acquisition times.
  • 3D EPI offers potential advantages for advanced fMRI applications.

Purpose of the Study:

  • To implement and evaluate a 3D EPI sequence at 7T.
  • To compare the sensitivity of 3D and 2D EPI at various spatial resolutions.
  • To assess the feasibility of 3D EPI for high-resolution, whole-brain fMRI.

Main Methods:

  • A 3D EPI sequence with parallel and partial Fourier capabilities was developed for 7T MRI.
  • Sensitivity was compared between 3D and 2D EPI at resolutions from 1.5-3.0 mm isotropic (N=4).
  • BOLD activation in the visual cortex was assessed using 1 mm isotropic 3D EPI (N=8).

Main Results:

  • 3D EPI demonstrated comparable or superior sensitivity in gray and white matter compared to 2D EPI.
  • Shorter volume repetition times (TR) for 3D EPI enabled whole-brain coverage at high resolutions.
  • Functional 3D EPI achieved whole-brain coverage with a TR of 3.2 s at 1 mm isotropic resolution.

Conclusions:

  • 3D EPI is a practical and effective alternative to 2D EPI for whole-brain fMRI at 7T.
  • The method supports high-resolution imaging and event-related fMRI with acceptable scan times.
  • 3D EPI offers significant advantages for advanced neuroimaging applications at ultra-high fields.