Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Reexamination Certificate
2011-06-21
2011-06-21
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
C250S363020, C250S363040, C250S370090, C378S004000, C378S010000, C378S019000, C378S098800
Reexamination Certificate
active
07964849
ABSTRACT:
A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a γ-ray is incident; and an analog ASIC and digital ASIC for processing a γ-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended γ-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.
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Ishitsu Takafumi
Seino Tomoyuki
Takahashi Isao
Ueno Yuichiro
Hitachi , Ltd.
Malevic Djura
Mattingly & Malur, P.C.
Porta David P
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