Radio-frequency receiver unit for a magnetic resonance apparatus

US6160400A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Axel Friedrich · Nuremberg, DE
• Helmut Greim · Höchstadt an der Aisch, DE
• Ludwig Kreischer · Dormitz, DE
• Jianmin Wang · Lo Wu, CN

Key dates

• Filing date: Jun 23, 1998
• Grant date: Dec 12, 2000
• Expiry date: Jun 23, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3628
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a radio-frequency receiver unit for a magnetic resonance apparatus, a reception antenna is connected to an input of a noise-matched field-effect transistor preamplifier with a low input impedance. The reception antenna is connected with a detuning stage. The RF receiver unit has a noise suppression stage that can be activated when the reception antenna is detuned.