Radiant energy – Invisible radiant energy responsive electric signalling
Reexamination Certificate
2005-11-22
2010-02-23
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
C250S363030, C712S015000
Reexamination Certificate
active
07667199
ABSTRACT:
A timing circuit for implementation in a medical imaging system such as a PET scanner, and a method of ascribing times to events in such systems, is disclosed. In one embodiment, the timing circuit includes an n-phase clock having n frequencies of operation, wherein the clock is selectable to provide n-signals that each vary at n frequencies, an n-phase counter including n counter elements coupled to the clock, an n-phase status detection circuit including n status circuits coupled to the n-phase clock, and an n-phase output circuit including n-registers coupled to the n-phase clock and respectively coupled to the n-phase counter and to n-phase status detection circuit, wherein n-registers respectively receive the n-clock signals, the n-count signals, and the n-status signals, respectively, and in response respectively provide n-output signals that collectively form an output signal indicative of a time at which the event detection signal experienced the first status change.
REFERENCES:
patent: 6593575 (2003-07-01), Fries
patent: 2003/0201838 (2003-10-01), Tam et al.
patent: 2004/0139276 (2004-07-01), Srinivasan et al.
patent: 2006/0187226 (2006-08-01), Bruno et al.
General Electric Company
Igyarto Carolyn
Porta David P
Small Dean D.
Small Patent Law Group
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