Noise-immune coil for unshielded magnetic resonance measurements

被引：29

作者：

Suits, BH ^{[1
]}

Garroway, AN

Miller, JB

机构：

[1] USN, Res Lab, Div Chem, Washington, DC 20375 USA

[2] Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA

来源：

JOURNAL OF MAGNETIC RESONANCE | 1998年 / 131卷 / 01期

关键词：

NQR; noise pickup; surface coil; split-loop resonator; RDX;

D O I：

10.1006/jmre.1997.1335

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A modified split-loop resonator that is electrically balanced and that has no magnetic dipole moment is shown to be relatively immune to environmental noise. Using a magnetic resonance surface coil of this design for N-14 NQR at 3.4 MHz, it is demonstrated that magnetic resonance measurements can be made in the laboratory without additional RF shielding and with less than a 2 dB increase in the rms noise. Compared to more traditional designs, the modified split-loop resonator showed a net 17-dB gain in sensitivity for unshielded measurements. (C) 1998 Academic Press.

引用

页码：154 / 158

页数：5

共 6 条

[1]

Chen CN, 1989, BIOMEDICAL MAGNETIC, P136

[2]

GARROWAY AN, 1994, P SOC PHOTO-OPT INS, V2276, P139, DOI 10.1117/12.189164

[3] THE THEORY OF SHIELDED LOOP RESONATORS [J].