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Magnetic Resonance Imaging01:24

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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...
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High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain
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Rapid brain MRI acquisition techniques at ultra-high fields.

Kawin Setsompop1,2, David A Feinberg3,4, Jonathan R Polimeni1,2

  • 1Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, USA.

NMR in Biomedicine
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PubMed
Summary

Ultra-high-field MRI offers better signal, but requires faster imaging. Simultaneous multislice (SMS) and 3D imaging accelerate data acquisition for high-resolution brain scans.

Keywords:
3D imaging3D-EPICAIPIRINHAsimultaneous multislice RF pulse designsimultaneous multislice, multiband, blipped-CAIPIwave-CAIPI

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Area of Science:

  • Neuroimaging
  • Magnetic Resonance Imaging (MRI)

Background:

  • Ultra-high-field MRI enhances signal-to-noise ratio (SNR) and contrast for detailed brain imaging.
  • Increased spatial resolution leads to longer scan times, limiting functional MRI temporal resolution and whole-brain coverage.

Purpose of the Study:

  • To review advancements in simultaneous multislice (SMS) and 3D imaging techniques for ultra-high-field MRI.
  • To highlight methods enabling rapid, high-resolution structural and functional brain imaging.

Main Methods:

  • Development of simultaneous multislice (SMS) and 3D imaging paradigms.
  • Leveraging multichannel receiver arrays for parallel imaging with controlled aliasing.
  • Exploiting improved SNR and encoding efficiency at ultra-high fields.

Main Results:

  • SMS and 3D imaging significantly improve acquisition speed, overcoming limitations of conventional 2D MRI.
  • These methods achieve high acceleration factors with minimal image artifacts and preserved SNR.
  • Enhanced SNR efficiency and encoding efficiency are achieved.

Conclusions:

  • SMS and 3D imaging are crucial for rapid, high-resolution structural and functional neuroimaging at ultra-high fields.
  • These technologies enable finer-scale brain information extraction through faster, more efficient MRI acquisition.
  • The review covers the latest developments in these rapid imaging technologies.