DOUBLE RESONANCE COIL ARRANGEMENT FOR A MAGNETIC RESONANCE DEVICE

• US 20070279062A1
• Filed: 06/01/2007
• Published: 12/06/2007
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Matschi, Volker, Greim, Helmut
• Granted Patent: US 7,570,059 B2
• Time in Patent Office: Days
• US Class Current: 324/322
• CPC Class Codes: G01R 33/3415 comprising arrays of sub-coils , i.e. phased-array coils with flexible receiver channels
• CPC Class Codes: G01R 33/3635 Multi-frequency operation
• CPC Class Codes: G01R 33/365 Decoupling of multiple RF coils wherein the multiple RF coils have the same function in MR, e.g. decoupling of a receive coil from another receive coil in a receive coil array, decoupling of a transmission coil from another transmission coil in a transmission coil array

Abstract

A double resonance coil arrangement for a magnetic resonance device has at least two coils, each having a coil conductor, in which at least one first capacitor, as well as at least one inductor forming an oscillating circuit with a second capacitor, are connected. The inductors of two adjacently arranged coils are at a distance from one another and form a transformer. The capacitors, the inductor and the distance are dimensioned such that each coil is double resonant and the at least two coils are decoupled from each other by the transformer.

Claims

1. A double resonance coil arrangement for a magnetic resonance apparatus, comprising:

at least two coils, each of said coils comprising a coil conductor with a first capacitor connected therein, and an inductor connected with a second capacitor therein to form an oscillating circuit, the at least two coil being disposed adjacent to each other with said inductors being disposed at a distance from each other; and

said distance between said inductors being dimensioned so that said inductors form a transformer, and said distance, the respective inductors, the respective first capacitors, and the respective second capacitors being dimensioned so that each of said at least two coils is double resonant and said at least two coils are decoupled from each other by said transformer.

2. A double resonant coil arrangement as claimed in claim 1 wherein each inductor has a self capacitance that forms the second capacitor for the coil containing that inductor.

3. A double resonant coil arrangement as claimed in claim 1 wherein each of said inductors has a self capacitance, and wherein each second capacitor is formed by the self-capacitance of the inductor and at least one discrete capacitor connected in parallel with the inductor.

4. A double resonant coil arrangement as claimed in claim 1 wherein the respective second capacitors have identical dimensions.

5. A double resonant coil arrangement as claimed in claim 1 wherein the respective first capacitors have identical dimensions.

6. A double resonant coil arrangement as claimed in claim 1 wherein at least one of said distance, said inductors, the respective first capacitors and the respective second capacitors is adjustable.

7. A double resonant coil arrangement as claimed in claim 1 comprising at least four coils arranged as a matrix, with horizontally and vertically adjacent coils in the matrix being decoupled by an overlapping of those coils, and diagonally adjacent coils in the matrix being decoupled by said transformer.