A pulsed electromagnet controller for prepolarized MRI

Author

Nam, Hyokwon ; Nandi, Subhasis ; Morgan, Patrick N.

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., TX, USA

Volume

4

fYear

2000

fDate

2000

Firstpage

2629

Abstract

Conventional magnetic resonance imaging (MRI) collects the signal from magnetization created in the sample by a strong and uniform magnetic field. An alternative approach, called prepolarized MRI (PMRI), uses a pulsed magnetic field to boost equilibrium magnetization in the sample prior to signal collection. Strong magnetization in the sample contributes to high signal-to-noise ratio (SNR) which is a fundamental measure of scanner performance. To enable PMRI experiments, a pulsed electromagnet controller has been designed and built. Here the theory of the controller is presented and initial results are discussed

Keywords

biomedical MRI; biomedical electronics; controllers; electromagnets; magnetic variables control; equilibrium magnetization; high signal-to-noise ratio; magnetic resonance imaging; prepolarized MRI; pulsed electromagnet controller; pulsed magnetic field; scanner performance; signal collection; strong magnetization; Electromagnets; MOSFET circuits; Magnetic field measurement; Magnetic fields; Magnetic resonance imaging; Magnetization; Pulse amplifiers; Pulse circuits; Signal to noise ratio; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-6465-1

Type

conf

DOI

10.1109/IEMBS.2000.901399

Filename

901399