Determination of appropriate RF blocking impedance for MRI surface coils and arrays

Armen Kocharian, Phillip J. Rossman, Thomas C. Hulshizer, Joel P. Felmlee, Stephen J. Riederer

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Surface and phased array receiving coils in MRI typically require that RF excitation be accomplished using the body coil. This process requires that the receiving coils contain blocking circuitry to increase the overall circuit impedance during RF excitation and withstand the electromotive force induced by the applied electromagnetic field. The aim of this study was to determine the optimal impedance range required during RF excitation based on an assessment of image quality. The experimental results are fit by an exponential model and establish criteria that can be applied for general receiver coil design. (C) 2000 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)80-83
Number of pages4
JournalMagnetic Resonance Materials in Physics, Biology and Medicine
Volume10
Issue number2
DOIs
StatePublished - Jun 1 2000

Keywords

  • Blocking circuit
  • MRI
  • Surface coil

ASJC Scopus subject areas

  • Biophysics
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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