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A simple method for investigating the effects of non-uniformity of radiofrequency transmission and radiofrequency reception in MRI

journal contribution
posted on 2023-06-07, 13:50 authored by G. J. Barker, A. Simmons, S. R. Arridge, P. S. Tofts
Inhomogeneity of the transmitted or received B1 field leads to intensity variations in MR images and spatial dependence in apparent concentration in MR spectra. We describe a simple method for investigating such variations. The transmitted B1 field can be measured both in vivo and in vitro which allows investigation of sample dependent effects that can not be measured on phantoms. For homogeneous regions the method also allows the received B1 field to be measured both in vivo and in vitro. Our method uses only a standard spin echo pulse sequence and simple region of interest analysis and should be implementable on any commercial scanner. The method is demonstrated using a variety of transmission and reception radiofrequency coils both in vivo and in vitro.

History

Publication status

  • Published

Journal

British Journal of Radiology

ISSN

0007-1285

Publisher

British Institute of Radiology

Issue

841

Volume

71

Page range

59-67

Department affiliated with

  • BSMS Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2007-02-28

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