Measurements of the radiofrequency field in magnetic resonance coils

被引：2
|
作者：
Fakri-Bouchet, L [1 ]
Lapray, C [1 ]
Briguet, A [1 ]
机构：
[1] Univ Lyon 1, CNRS, CPE, UPRESA 5012,Lab RMN, F-69622 Villeurbanne, France
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 1998年 / 9卷 / 09期
关键词：
magnetic resonance antennae; resonators; MRI/rf coils; radiofrequency field distribution uniformity; field experimental evaluation; field mapping; laboratory measurement system;
D O I：
10.1088/0957-0233/9/9/040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This design note describes an inexpensive system used to control the radiofrequency field generated by magnetic resonance coils. The device is built around three main modules, a sequencer, a modulator and a phase-sensitive detector. This system permits one to detect the radiofrequency field at each point of the region of interest using a pick-up coil, without the requirement of a magnetic resonance spectrometer. Examples of radiofrequency field distributions obtained at 85 MHz are given.
引用
收藏
页码：1641 / 1646
页数：6
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