Instrument and method to facilitate and improve the timing...

Details Instrument and method to facilitate and improve the timing... Instrument and method to facilitate and improve the timing...

2007-07-24

2007-07-24

Porta, David (Department: 2884)

Radiant energy

Calibration or standardization methods

C250S363030

Reexamination Certificate

active

10700157

ABSTRACT:
A system for providing the timing alignment for a scanner. The system includes a removable source and detector assembly which is placed near the center of the scanner when in use. The source includes a long-lived positron emitting radioactive source. The radioactive source is in close contact with a fast plastic scintillator or other mechanism of detecting the ionization due to positron decay. A method for reading out the precise time at which the surrounding medium detects the ionization due to positron decay. A mechanism for using this time as a reference clock unto which the detectors in the scanner can be aligned.

REFERENCES:
patent: 4060726 (1977-11-01), Luitwieler et al.
patent: 5841140 (1998-11-01), McCroskey et al.
patent: 6774358 (2004-08-01), Hamill et al.

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