Parametric Amplification of Magnetic Resonance Images

Author

Syms, Richard R A ; Floume, Timmy ; Young, Ian R. ; Solymar, Laszlo ; Rea, Marc

Author_Institution

EEE Dept., Imperial Coll. London, London, UK

Volume

12

Issue

6

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

1836

Lastpage

1845

Abstract

Parametric amplification is considered as a method for the detection of magnetic resonance imaging (MRI) signals. The theory of three-frequency amplifiers is reviewed, and aspects relevant to radio-frequency detection are highlighted. The modifications needed for MRI are described, and a parametrically amplified surface coil for 63.85 MHz operation is demonstrated. Electrical characterization is carried out, and good agreement is obtained with the theory. A linear gain of 100 (40 dB power gain) and a Q-factor of 18 000 are demonstrated. ¹H MRI is carried out at 1.5 T and frequency-domain filtering of images is demonstrated.

Keywords

amplifiers; frequency-domain analysis; magnetic resonance imaging; MRI signal; Q-f&ctoτ; electrical characterization; frequency 63.85 MHz; frequency-domain filtering; magnetic resonance images; parametric amplification surface coil; radio-frequency detection; three-frequency amplifiers; Bandwidth; Coils; Gain; Magnetic resonance imaging; Noise; Q factor; Resonant frequency; Magnetic resonance imaging; parametric amplification;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2011.2176928

Filename

6086558