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

Hyoungsuk Yoo; Anand Gopinath; J. T Vaughan

doi:10.1109/MWSYM.2010.5516743

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 proceeding › Conference contribution

5 Scopus citations

Abstract

The higher static magnetic fields B_o, 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 language	English (US)
Title of host publication	2010 IEEE MTT-S International Microwave Symposium, MTT 2010
Pages	752-755
Number of pages	4
DOIs	https://doi.org/10.1109/MWSYM.2010.5516743
State	Published - 2010
Event	2010 IEEE MTT-S International Microwave Symposium, MTT 2010 - Anaheim, CA, United States Duration: May 23 2010 → May 28 2010

Publication series

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

Other

Other	2010 IEEE MTT-S International Microwave Symposium, MTT 2010
Country/Territory	United States
City	Anaheim, CA
Period	5/23/10 → 5/28/10

Keywords

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

Publisher link

10.1109/MWSYM.2010.5516743

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Cite this

Yoo, H, Gopinath, A & Vaughan, JT 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., 5516743, IEEE MTT-S International Microwave Symposium Digest, pp. 752-755, 2010 IEEE MTT-S International Microwave Symposium, MTT 2010, Anaheim, CA, United States, 5/23/10. https://doi.org/10.1109/MWSYM.2010.5516743

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