Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Reexamination Certificate
2008-10-08
2010-06-08
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
Reexamination Certificate
active
07732776
ABSTRACT:
Provided is a radiation imaging apparatus including: a conversion unit including a plurality of pixels arranged two-dimensionally, wherein each of the pixels includes a conversion element for converting incident radiation into an electric charge and a switching element for transferring an electric signal based on the electric charge; a drive circuit unit for outputting, to the switching element, a drive signal having a voltage for turning on the switching element; a read-out circuit unit for reading out the electric signal from the pixel; a calculating unit for calculating the S/N ratio of the electric signal read out by the read-out circuit unit; and a determination unit capable of changing the voltage of the drive signal output from the drive circuit unit according to the S/N ratio calculated. As a result, the radiation imaging apparatus capable of improving the S/N ratio of the derived image is provided.
REFERENCES:
patent: 6163029 (2000-12-01), Yamada et al.
patent: 2006/0065944 (2006-03-01), Mochizuki et al.
patent: 2007/0125952 (2007-06-01), Endo et al.
Endo Tadao
Kameshima Toshio
Takenaka Katsuro
Yagi Tomoyuki
Yokoyama Keigo
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Porta David P
Taningco Marcus H
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