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Knee MRI under varying flexion angles utilizing a flexible flat cable antenna.

Fan Jia1, Hongyang Yuan, Diange Zhou

  • 1Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China.

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|March 6, 2015
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Summary

This study introduces a novel flexible flat cable antenna (FFCA) for knee MRI. The FFCA demonstrates superior signal-to-noise ratio and coverage, improving magnetic resonance imaging quality at various knee flexion angles.

Keywords:
FFCAflexible MR receiverflexion anglehigh SNRknee MRIlarge FOVloopless antennamonopole antenna

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Area of Science:

  • Medical Imaging
  • Electrical Engineering
  • Biomedical Engineering

Background:

  • Magnetic Resonance Imaging (MRI) is crucial for knee joint assessment.
  • Existing knee coils can have limitations in coverage and signal-to-noise ratio (SNR), especially at different flexion angles.

Purpose of the Study:

  • To fabricate and evaluate a novel flexible flat cable antenna (FFCA) for knee MRI.
  • To assess the FFCA's performance across various knee flexion angles.

Main Methods:

  • Fabrication of the FFCA using a flat cable, tuning/matching circuit, and signal transmission line.
  • In vitro and in vivo experiments conducted on a 3.0T MR scanner.
  • Comparison of FFCA performance against a commercial eight-channel knee coil.

Main Results:

  • In vitro SNR of FFCA was 336, exceeding the commercial coil's 291; phantom images showed homogeneous distribution.
  • In vivo SNR was 169 with >48.5 cm longitudinal coverage, surpassing the commercial coil's 153 SNR and 22.5 cm coverage.
  • Satisfactory knee images acquired at various flexion angles.

Conclusions:

  • The FFCA offers a simple, low-cost solution with a large field of view and high SNR for knee MRI.
  • The FFCA shows potential for improving MR image quality of the knee joint, particularly at different flexion angles.