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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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Pipeline for Planning and Execution of Transcranial Ultrasound Neuromodulation Experiments in Humans
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Parallel traveling-wave MRI: a feasibility study.

Yong Pang1, Daniel B Vigneron, Xiaoliang Zhang

  • 1Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA.

Magnetic Resonance in Medicine
|August 23, 2011
PubMed
Summary
This summary is machine-generated.

This study explores traveling-wave parallel imaging using microstrip patch antenna arrays. Results demonstrate the technique

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Antenna Engineering

Background:

  • Traveling-wave magnetic resonance imaging (MRI) uses antenna far fields for radio frequency (RF) generation in large-sample imaging.
  • Parallel imaging techniques accelerate MRI acquisition but require careful RF field control.

Purpose of the Study:

  • To investigate the feasibility of applying traveling-wave techniques to parallel MRI using microstrip patch antenna arrays.
  • To evaluate the performance of traveling-wave parallel imaging through numerical simulations and experimental validation.

Main Methods:

  • Developed a microstrip patch antenna array model for traveling-wave parallel MRI.
  • Conducted numerical simulations to analyze sensitivity patterns and calculate g-factors.
  • Performed experimental tests on the antenna array and validated results with 7T MRI.

Main Results:

  • Achieved excellent isolation (> -26 dB) and impedance matching (< -36 dB) for array elements.
  • Simulated B1- sensitivity patterns and g-factors confirmed the feasibility of traveling-wave parallel imaging.
  • Demonstrated that array configuration influences sensitivity patterns and g-factor maps, offering control over B1 fields.

Conclusions:

  • Traveling-wave parallel imaging using microstrip patch antenna arrays is feasible.
  • Antenna array design offers a method to optimize B1 field distribution and enhance parallel imaging performance.
  • The proposed method was successfully validated in 7T MRI experiments.