Patent · US Expired

Circularly polarizing RF antenna for an MRI apparatus

US5144239A · kind A · utility

10Cited by

8References

2Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Ralph Oppelt · Uttenreuth, DE
Horst Siebold · Erlangen, DE

Key dates

Filing date	Aug 10, 1990
Grant date	Sep 1, 1992
Priority date	—
Expiry date	Aug 10, 2010

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/34007
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A circularly polarizing RF antenna suitable for use in a magnetiic resonance imaging tomography apparatus has four current loops, each formed by two U-shaped conductors with the ends of the lateral legs of the U-shaped conductors disposed opposite to each other in mirror-symmetric fashion, and the ends of the lateral legs being bridged by a resonant capacitor. The current loops are arranged on a carrier which forms a portion of a hollow cylinder, and which is divided in an axial direction between two of the current loops, so that at least one of the current loops is removable without electrical contacts. A divisible RF antenna is thus achieved into which a head or a knee joint can be easily introduced for imaging.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.