On the performance of tubular surface coils in nuclear magnetic resonance imaging and spectroscopy

Author

Lou, Xiaoming ; Smith, Charles D. ; Gedney, Stephen D. ; Li, Jian ; Kadaba, Prasad K.

Author_Institution

Dept. of Electr. Eng., Kentucky Univ., Lexington, KY, USA

Volume

42

Issue

1

fYear

1995

fDate

2/1/1995 12:00:00 AM

Firstpage

41

Lastpage

47

Abstract

Surface coils are important devices in the clinical application of nuclear magnetic resonance imaging and spectroscopy (NMRIS) because they have higher signal-to-noise ratios than body or head coils in superficial regions. This paper describes our theoretical and experimental study of the performances of tubular surface coils, aiding the effective application of such coils to NMRIS. We present formulas for the RF magnetic (H₁) fields produced by tabular surface coils placed over layered media, and for the self- and loaded-impedances of these coils. The calculated results show the dependence of the coil performances on the coil design parameters and the characteristics of the sample under test. We include the calculated results for the H₁ field phase shifts in conductive samples

Keywords

NMR spectroscopy; biomedical NMR; H₁ field phase shifts; NMRIS; RF magnetic fields; clinical application; coil design parameters; conductive samples; layered media; loaded-impedances; nuclear magnetic resonance imaging; nuclear magnetic resonance spectroscopy; self-impedances; signal-to-noise ratios; superficial regions; tubular surface coils performance; Coils; Equations; Magnetic field measurement; Magnetic resonance imaging; Nonhomogeneous media; Nuclear magnetic resonance; Radio frequency; Spectroscopy; Surface impedance; Transmitters;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.364880

Filename

364880