Reception unit for a magnetic resonance tomography apparatus
AssigneeSiemens Aktiengesellschaft
InventorRalph Oppelt
Life of this patent
Estimating the term…
Abstract
A reception unit for a magnetic resonance tomography apparatus has an RF preamplifier connected at its signal input to a local coil with a PIN diode connected in parallel with the signal input and a supply voltage connection of the RF preamplifier being connected to a direct voltage source. The reception unit has a supply node that is connected with the supply voltage connection, the PIN diode and a cross-over switch for alternating connection of the supply node to the direct voltage source or a direct current source.
Claims11
A reception unit for a magnetic resonance tomography apparatus having a local reception coil, said reception unit comprising:
- an RF preamplifier having a signal input adapted for connection to the local coil, said RF preamplifier having a supply voltage input;
- a PIN diode connected in parallel with said signal input;
- a direct voltage source;
- a direct current source;
- a switch having a first switch terminal selectively connectable to said direct voltage source during a reception phase of said local coil and to said direct current source during a transmission phase of said local coil, said switch having a second switch terminal;
- and
- a supply note connecting said supply voltage input of said RF preamplifier, said PIN diode, and said second switch terminal, so that said supply node also is connected to said direct voltage source during said reception phase and to said direct current source during said transmission phase.
Dependencies are inferred from the claim text.