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Related Experiment Video

Updated: Jun 10, 2026

Construction of a Compact Low-Cost Radiation Shield for Air-Temperature Sensors in Ecological Field Studies
05:56

Construction of a Compact Low-Cost Radiation Shield for Air-Temperature Sensors in Ecological Field Studies

Published on: November 6, 2018

Transmit/receive radiofrequency coil with individually shielded elements.

Kyle M Gilbert1, Andrew T Curtis, Joseph S Gati

  • 1Centre for Functional and Metabolic Mapping, Robarts Research Institute, The University of Western Ontario, London, Ontario, Canada. kgilbert@imaging.robarts.ca

Magnetic Resonance in Medicine
|July 22, 2010
PubMed
Summary
This summary is machine-generated.

A novel shielding method improves magnetic resonance imaging (MRI) coil element decoupling for better head imaging. This technique enhances isolation and reduces geometry factors, offering versatile coil design possibilities.

Related Experiment Videos

Last Updated: Jun 10, 2026

Construction of a Compact Low-Cost Radiation Shield for Air-Temperature Sensors in Ecological Field Studies
05:56

Construction of a Compact Low-Cost Radiation Shield for Air-Temperature Sensors in Ecological Field Studies

Published on: November 6, 2018

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Radiofrequency (RF) Coil Engineering

Background:

  • Decoupling coil elements in transmit/receive (transceive) arrays is crucial for independent coil behavior.
  • Conventional methods like overlapping and capacitive decoupling have limitations in performance and design flexibility.

Purpose of the Study:

  • To introduce and evaluate a novel concentric and radial shielding method for decoupling transceive coil elements.
  • To compare the performance of this new method against conventional decoupling techniques for head imaging at 7 Tesla.

Main Methods:

  • Developed a six-channel transceive coil using the novel individually shielded element design.
  • Compared the shielded coil with conventionally decoupled coils based on isolation, transmit uniformity, efficiency, signal-to-noise ratio (SNR), and geometry factors.
  • Optimized element inset distance within shields to assess impact on performance.

Main Results:

  • The individually shielded coil demonstrated superior element isolation (2.7-4.0 dB) and lower geometry factors (2-14%) compared to conventional methods.
  • A trade-off was observed with reduced transmit efficiency (2.8-5.9 dB) and SNR (up to 34%), which was partially mitigated by reducing inset distance.
  • No significant difference in absorbed power during RF pulses was noted.

Conclusions:

  • The novel shielding method effectively decouples coil elements, offering improved performance metrics like isolation and geometry factors.
  • This technique provides significant design versatility for creating 3D conformal transceive arrays with arbitrary element configurations.
  • Further optimization, such as adjusting inset distance, can enhance transmit efficiency and SNR, making it a promising approach for advanced MRI applications.