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Related Experiment Videos

MR imaging with phase encoding of intermolecular multiple quantum coherences.

S Sendhil Velan1, P T Narasimhan, R E Jacobs

  • 1Biological Imaging Center, 139-74 Beckman Institute, California Institute of Technology, Pasadena, California 91125, USA.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|September 5, 2001
PubMed
Summary

New MRI techniques use phase encoding of intermolecular multiple quantum coherences (i-MQCs) to create high-resolution images. These methods eliminate artifacts and offer enhanced resolution for imaging water-rich biological and nonbiological materials.

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Area of Science:

  • Magnetic Resonance Imaging
  • Quantum Coherence Phenomena

Background:

  • Intermolecular zero quantum coherences (i-ZQCs) in MRI lack phase encoding, limiting image resolution and introducing artifacts.
  • Existing MRI techniques struggle to effectively image materials with high water content due to signal limitations.

Purpose of the Study:

  • To introduce novel 2D and 3D pulse sequences for Magnetic Resonance Imaging (MRI).
  • To generate images utilizing the phase encoding of intermolecular multiple quantum coherences (i-MQCs).
  • To overcome limitations associated with i-ZQCs and enhance image resolution.

Main Methods:

  • Development of novel 2D and 3D pulse sequences.
  • Phase encoding of intermolecular multiple quantum coherences (i-MQCs).
  • Implementation of additional phase cycling to eliminate artifacts.

Related Experiment Videos

Main Results:

  • Acquired MRI signals are free from intermolecular zero quantum coherences (i-ZQCs).
  • Phase encoding during n-quantum evolution provides n times the resolution compared to single quantum coherences.
  • Demonstrated artifact elimination through phase cycling.

Conclusions:

  • The presented pulse sequences enable artifact-free i-MQC imaging.
  • Enhanced resolution is achieved for i-MQC imaging, significantly improving detail.
  • Potential applications include advanced imaging of biological tissues and water-rich nonbiological materials.