Travelling-wave excitation for 16.4T small-bore MRI

Author

Bluem, Patrick ; Tonyushkin, Alexey ; Deelchand, Dinesh ; Adriany, Gregor ; Van de Moortele, Pierre-Francois ; Kiruluta, Andrew J. M. ; Popovic, Zoya

Author_Institution

Univ. of Colorado, Boulder, CO, USA

fYear

2015

fDate

17-22 May 2015

Firstpage

1

Lastpage

4

Abstract

In this paper, we present the design of a probe for a travelling-wave 16.4T small-bore animal research MRI system. The probe is a 698-MHz coaxially-fed microstrip patch designed to give a circularly polarized magnetic field when placed in the bore cavity. Images of a water phantom using the patch probe are obtained and compared with simulations. Additionally, a periodic axial strip cylinder is inserted into the bore, resulting in a 7-fold increase in SNR, and enabling both gradient recalled echo and spin echo imaging of the phantom. The modified mode content in the image is compared to full-wave simulations.

Keywords

biomedical MRI; bore cavity; circularly polarized magnetic field; coaxially-fed microstrip patch; frequency 698 MHz; full-wave simulations; magnetic flux density 16.4 T; periodic axial strip cylinder; spin echo imaging; travelling-wave excitation; travelling-wave small-bore animal research MRI system; water phantom; Detectors; Image edge detection; Indexes; Load modeling; Magnetic resonance imaging; Microwave imaging; Phantoms; Magnetic Resonance Imaging; circular polarization; patch; travelling-wave; waveguide;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium (IMS), 2015 IEEE MTT-S International

Conference_Location

Phoenix, AZ

Type

conf

DOI

10.1109/MWSYM.2015.7166875

Filename

7166875