Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Reexamination Certificate
2004-01-05
2008-11-18
Sung, Christine (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
Reexamination Certificate
active
07453066
ABSTRACT:
Gamma radiation events are received individually at elements of a detector array (18) at least one of the elements (P0) being defective. Each detector element converts incident radiation into a radiation event signal which is digitized by an analog-to-digital converter (42) into a coordinate position (x,y) on the detector array and energy (z). An event generator (48) generates radiation event signals for each defective element based on radiation events received at contributing elements, e.g., nearest neighbor elements (P1-P8). In a preferred embodiment, the contribution from each of the contributing elements is randomized by passing a token (56) among positions of a table (54) corresponding to each of the contributing elements. Each time a radiation event is received at the contributing element whose corresponding table position holds the token, that event also generates an event signal for the defective element and the token is passed (58). The energy of the generated event for the defective detector element is randomized (62), such as by replacing the least significant bits with random numbers.
REFERENCES:
patent: 5657400 (1997-08-01), Granfors et al.
patent: 5774601 (1998-06-01), Mahmoodi
patent: 6118846 (2000-09-01), Liu
patent: 6296387 (2001-10-01), Guillemaud
patent: 6529618 (2003-03-01), Ohara et al.
patent: 6792159 (2004-09-01), Aufrichtig et al.
patent: 2002/0080917 (2002-06-01), Granfors et al.
patent: 2002/0139970 (2002-10-01), Iwanczyk et al.
patent: 2002330341 (2002-11-01), None
Koren, I., et al.; A Self-Correcting Active Pixel Camera; IEEE; 2000; pp. 56-64.
Hansen Kim H.
Karpati Thomas
Petrillo Michael J.
Koninklijke Philips Electronics , N.V.
Sung Christine
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