Concurrent DC-Coupled Anode and Dynode Readout Scheme For PET Block Detectors
AssigneeSiemens Medical Solutions USA, Inc.
InventorsNan Zhang, Matthias J. Schmand, Niraj K. Doshi, Michael D. Loope
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Abstract
A scintillation detector including one or more photomultiplier tubes, a scintillation block optically attached to the photomultiplier tubes, and a DC-coupled bleeder circuit combining outputs of dynodes of the photomultipliers to provide a DC-coupled dynode output together with a DC-coupled anode output of the photomultiplier tubes. The DC-coupled bleeder circuit includes a RF transformer. A positive high voltage supply also can be used together with a DC-coupled bleeder circuit for the anode outputs.
Claims21
A scintillation detector, comprising:
- at least one photomultiplier tube having a plurality of dynodes and an anode;
- a scintillation block optically coupled to the at least one photomultiplier tube;
- a DC-coupled anode output;
- and
- a bleeder circuit providing a DC-coupled dynode output from at least one of said dynodes.
A PET block scintillation detector, comprising:
- a plurality of photomultiplier tubes each having a plurality of dynodes and an anode;
- a scintillation block optically coupled to said plurality of photomultiplier tubes;
- a negative high voltage supply coupled to said plurality of photomultiplier tubes;
- a DC-coupled anode output of a combination of anode outputs of said plurality of photomultiplier tubes;
- and
- a bleeder circuit providing a DC-coupled dynode output from a combination of dynode outputs of said plurality of photomultiplier tubes.
A PET block scintillation detector, comprising:
- a plurality of photomultiplier tubes each having a plurality of dynodes and an anode;
- a scintillation block optically coupled to said plurality of photomultiplier tubes;
- a positive high voltage supply coupled to said plurality of photomultiplier tubes;
- a first bleeder circuit providing a DC-coupled anode output from a combination of dynode outputs of said plurality of photomultiplier tubes;
- and
- a second bleeder circuit providing a DC-coupled dynode output from a combination of dynode outputs of said plurality of photomultiplier tubes.
A scintillation detector, comprises:
- at least one photomultiplier tube having a plurality of dynodes and an anode;
- a scintillation block optically coupled to at least one photomultiplier tube;
- and
- a bleeder circuit providing a DC coupled anode and having a high voltage supply.
Dependencies are inferred from the claim text.