SINGLE-INPUT DOUBLE-TUNED FOSTER-TYPE PROBE CIRCUIT

被引:6
作者
KAN, S [1 ]
JEHENSON, P [1 ]
LEROYWILLIG, A [1 ]
机构
[1] CEA,SERV HOSP FREDERIC JOLIOT,DRIPP,F-91406 ORSAY,FRANCE
关键词
D O I
10.1002/mrm.1910260103
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Synthesizing two different values of inductance from a given sample coil for use in a single‐input double‐tuned circuit is possible by means of three extra LC elements. A detailed analysis with derived equations shows how to calculate the circuit component values and what to expect from this kind of probe. It also derives the upper limit of the trap coil/sample coil inductance ratio beyond which no solution exists to double‐tune the 31P‐1H probe. The general expression for the channel efficiency shows that the latter is a function not only of the inductance of the coils, but also of their quality factor and of the operating frequencies. A numerical example is given illustrating good agreement between experiment and theory provided high quality rf capacitors are used. © 1991 Academic Press, Inc. Copyright © 1992 Wiley‐Liss, Inc., A Wiley Company
引用
收藏
页码:7 / 15
页数:9
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