Transmitter/receiver antenna for MR with improved decoupling between antenna elements

US7916920B2 · kind B2 · utility

Assignees

• BUNDESREPUBLIK DEUTSCHLAND, VERTRETEN DURCH DAS BUNDESMINISTERIUM FUR WIRTSCHAFT UND ENERGIE, DIESES VERTRETEN DURCH DEN PRASIDENTEN DER PHYSIKALISCH-TECHNISCHEN BUNDESANSTALT · DE
• UNIVERSITÄT LEIPZIG · DE

Inventors

• Frank Seifert · Schwanau, DE
• Evgenia Kirilina · Berlin, DE
• Thomas Riemer · Jena, DE

Key dates

• Filing date: May 15, 2008
• Grant date: Mar 29, 2011
• Expiry date: May 15, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5612
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A magnetic resonance tomograph is provided with a magnetic resonance system comprising at least two high-frequency transmitting/receiving units, each containing 1) a high-frequency transmitting/receiving coil, 2) a high-frequency current source that can be coupled to the high-frequency transmitting/receiving coil for transmitting, and 3) an amplifier that can be coupled to the high-frequency transmitting/receiving coil for receiving. A selector switch is provided, which keys a supply voltage to disconnect the amplifier during a transmission operation and the high-frequency current source during a receiving operation from the high-frequency transmitting/receiving coil. An inductor and a capacitor are provided between the high-frequency transmitting/receiving coil and the amplifier and form a series resonating circuit at the magnetic resonance frequency. A first diode is disposed between the selector switch and the capacitor of the series resonance circuit, and a second diode is disposed between the high-frequency current source and the high-frequency transmitting/receiving coil, such that the magnetic resonance system can be placed in a transmission mode by means of the selector swi…