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  Modified perturbation method for transverse electromagnetic (TEM) coil tuning and evaluation

Avdievich, N., Krymov, V., & Hetherington, H. (2003). Modified perturbation method for transverse electromagnetic (TEM) coil tuning and evaluation. Magnetic Resonance in Medicine, 50(1), 13-18. doi:10.1002/mrm.10539.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-6A44-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-6A45-7
Genre: Journal Article

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Avdievich, NI1, Author              
Krymov, VN, Author
Hetherington, HP, Author
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1External Organizations, ou_persistent22              

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 Abstract: A modified perturbation method for tuning and testing volume head coils was developed. The common perturbation method, utilizing the change in resonance frequency of a resonator in response to the presence of a small dielectric or magnetic probe, was modified to modulate the frequency shift due to rotation of a probe. This modification enabled the RF magnetic and electric fields as well as the angular distribution of current in the longitudinal elements of the coil to be mapped. The latter serves as a quick test of magnetic field homogeneity by comparing the measured distribution with the sinusoidal function required for the field to be homogenous. The method was experimentally applied to tune and test a transverse electromagnetic (TEM) head coil.

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 Dates: 2003-07
 Publication Status: Published in print
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 Identifiers: DOI: 10.1002/mrm.10539
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Title: Magnetic Resonance in Medicine
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 50 (1) Sequence Number: - Start / End Page: 13 - 18 Identifier: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149