A Microwave Engineer´s View of MRI

Author

Omar, Abbas ; Caverly, Robert ; Doherty, William E., Jr. ; Watkins, Ronald ; Gopinath, Anand ; Vaughan, J. Thomas

Author_Institution

Univ. of Magdeburg, Magdeburg, Germany

Volume

12

Issue

3

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

78

Lastpage

86

Abstract

An overview on how MRI works has been given.Compared to microwave imaging, which maps the 3-D steady-state permittivity distribution of the imaged object, MRI can be viewed as mapping the 3-D transient permeability distribution created by applying a very strong static magnetic field. The high-Q nature of this transient is associated with a relatively long decay time, which allows for acquiring and processing the object response conveniently. Besides the theoretical fundamentals, two technical issues related to microwave engineering have been addressed, namely, RF switching and high-field RF coils.

Keywords

biomedical MRI; biomedical engineering; magnetic permeability; microwave imaging; permittivity; 3-D steady-state permittivity distribution; 3-D transient permeability distribution; MRI; RF coils; RF switching; decay time; microwave engineering; microwave imaging; Electric fields; Magnetic domains; Magnetic fields; Magnetic moments; Magnetic resonance imaging; Radio frequency;

fLanguage

English

Journal_Title

Microwave Magazine, IEEE

Publisher

ieee

ISSN

1527-3342

Type

jour

DOI

10.1109/MMM.2011.940318

Filename

5742646