A method to control non-uniformity RF B1 field for high field magnetic resonance imaging

Hyoungsuk Yoo, Anand Gopinath, J. T Vaughan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

The higher static magnetic fields Bo, in MRI systems result in higher signal to noise ratios. However, as the wavelength decreases linearly with the higher static magnetic field, image inhomogeneity occurs. This paper demonstrates the use of the convex optimization with an iterative method to improve B1+ uniformity in an anatomic region of interest by varying the magnitude and phase of each RF channel element independently. The simulation results for 16 channels for 9.4T systems are discussed in detail, with experimental results in a phantom.

Original languageEnglish (US)
Title of host publication2010 IEEE MTT-S International Microwave Symposium, MTT 2010
Pages752-755
Number of pages4
DOIs
StatePublished - Oct 15 2010
Event2010 IEEE MTT-S International Microwave Symposium, MTT 2010 - Anaheim, CA, United States
Duration: May 23 2010May 28 2010

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Other

Other2010 IEEE MTT-S International Microwave Symposium, MTT 2010
CountryUnited States
CityAnaheim, CA
Period5/23/105/28/10

Keywords

  • Convex optimization
  • High field MRI
  • Magnetic resonance imaging (MRI)
  • Parallel excitation
  • RF B field
  • Transmission line head coil

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    Yoo, H., Gopinath, A., & Vaughan, J. T. (2010). A method to control non-uniformity RF B1 field for high field magnetic resonance imaging. In 2010 IEEE MTT-S International Microwave Symposium, MTT 2010 (pp. 752-755). [5516743] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2010.5516743