X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Reexamination Certificate
2006-03-21
2006-03-21
Church, Craig E. (Department: 2882)
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
C378S108000, C250S370090
Reexamination Certificate
active
07016466
ABSTRACT:
An apparatus and method used in intra-oral dental x-ray imaging equipment provides automatic detection of the x-ray emission in order to obtain timely transition to the image integration and acquisition phase with high level of rejection of false triggering induced by blemish defects of the image sensor or by variations of the ambient and temperature conditions. A solid state imager, such as a CCD image sensor, is continually clocked during the standby phase prior to irradiation from an X-ray source, so providing on same time an output signal proportional to the accumulated dark current and the continuous removal of the same. A control unit analyses the output signal of the imager, detects the variation caused by the start of the x-ray emission using appropriate threshold levels, and automatically triggers the imager to the image integration and acquisition phases. Based on memorised maps of the imager blemish defects, and continually monitored variations of the imager output signal, the control unit will reject false triggering due to imager defects or variations of the ambient and temperature conditions.
REFERENCES:
patent: 3894235 (1975-07-01), Franke
patent: 3911273 (1975-10-01), Franke
patent: 3974385 (1976-08-01), Grim
patent: 3987281 (1976-10-01), Hodes
patent: 3991314 (1976-11-01), Schmitman et al.
patent: 4021672 (1977-05-01), Franke
patent: 4061920 (1977-12-01), Mollendorf et al.
patent: 4070578 (1978-01-01), Timothy et al.
patent: 4097741 (1978-06-01), Pfeiler et al.
patent: 4104531 (1978-08-01), Weiss
patent: 4158138 (1979-06-01), Hellstrom
patent: 4160906 (1979-07-01), Daniels et al.
patent: 4160997 (1979-07-01), Schwartz
patent: 4188537 (1980-02-01), Franke
patent: 4247780 (1981-01-01), Webber et al.
patent: 4259582 (1981-03-01), Albert
patent: 4352987 (1982-10-01), Hayashi et al.
patent: 4454606 (1984-06-01), Relihan
patent: 4475224 (1984-10-01), Grassme
patent: 4486896 (1984-12-01), Richter et al.
patent: 4495632 (1985-01-01), Nakano
patent: 4501010 (1985-02-01), Grassme
patent: 4589121 (1986-05-01), Makino
patent: 4641331 (1987-02-01), Makino et al.
patent: 4675888 (1987-06-01), Gastrin
patent: 4741007 (1988-04-01), Virta et al.
patent: 4783793 (1988-11-01), Virta et al.
patent: 4797905 (1989-01-01), Ochmann et al.
patent: 4811372 (1989-03-01), Doebert et al.
patent: 4813060 (1989-03-01), Heubeck et al.
patent: 4815115 (1989-03-01), Nieminen et al.
patent: 4823369 (1989-04-01), Guenther et al.
patent: 4847881 (1989-07-01), Heubeck
patent: 4856038 (1989-08-01), Guenther et al.
patent: 4878234 (1989-10-01), Pfeiffer et al.
patent: 4905265 (1990-02-01), Cox et al.
patent: 4930146 (1990-05-01), Flakas et al.
patent: 4980905 (1990-12-01), Meccariello
patent: 4985907 (1991-01-01), Moteni
patent: 4995062 (1991-02-01), Schulze-Ganzlin et al.
patent: 5005195 (1991-04-01), Lanza et al.
patent: 5018177 (1991-05-01), McDavid et al.
patent: 5043582 (1991-08-01), Cox et al.
patent: 5090040 (1992-02-01), Lanza et al.
patent: 5090047 (1992-02-01), Angotti et al.
patent: 5093852 (1992-03-01), Nishikawa et al.
patent: 5195114 (1993-03-01), Sairenji et al.
patent: 5214686 (1993-05-01), Webber
patent: 5267296 (1993-11-01), Albert
patent: 5293312 (1994-03-01), Waggener
patent: 5386448 (1995-01-01), Tammisalo et al.
patent: D355964 (1995-02-01), Nelvig
patent: 5425065 (1995-06-01), Jarvenin
patent: 5434418 (1995-07-01), Schick
patent: 5454022 (1995-09-01), Lee et al.
patent: 5473660 (1995-12-01), Bastiaens et al.
patent: 5490197 (1996-02-01), Albert et al.
patent: 5511106 (1996-04-01), Doebert et al.
patent: 5513252 (1996-04-01), Blaschka et al.
patent: 5519437 (1996-05-01), Nelvig
patent: 5519751 (1996-05-01), Yamamoto et al.
patent: 5541974 (1996-07-01), Sklebitz
patent: 5579366 (1996-11-01), Doebert et al.
patent: 5583905 (1996-12-01), Nishiki et al.
patent: 5600699 (1997-02-01), Suzuki et al.
patent: 5602896 (1997-02-01), Diepstraten
patent: 5608455 (1997-03-01), Oda
patent: 5617462 (1997-04-01), Spratt
patent: 5625662 (1997-04-01), Toth et al.
patent: 5640018 (1997-06-01), Suzuki et al.
patent: 5663998 (1997-09-01), Suzuki et al.
patent: 5664001 (1997-09-01), Tachibana et al.
patent: 5668375 (1997-09-01), Petrick et al.
patent: 5677940 (1997-10-01), Suzuki et al.
patent: 5694448 (1997-12-01), Morcom
patent: 5742659 (1998-04-01), Atac et al.
patent: 5744806 (1998-04-01), Frojd
patent: 5751783 (1998-05-01), Granfors et al.
patent: 5757011 (1998-05-01), Whitebook et al.
patent: 5773832 (1998-06-01), Sayed et al.
patent: 5784429 (1998-07-01), Arai
patent: 5796430 (1998-08-01), Katoh et al.
patent: 5812191 (1998-09-01), Orava et al.
patent: 5828720 (1998-10-01), Syrjanen
patent: 5828721 (1998-10-01), Schulze-Ganzlin et al.
patent: 5864146 (1999-01-01), Karellas
patent: 5892227 (1999-04-01), Schieber et al.
patent: 5912942 (1999-06-01), Schick et al.
patent: 5923722 (1999-07-01), Schulz
patent: 5930330 (1999-07-01), Wolfe et al.
patent: 5933471 (1999-08-01), Kalvin
patent: 5969360 (1999-10-01), Lee
patent: 5974166 (1999-10-01), Ino et al.
patent: 6002742 (1999-12-01), Nelvig
patent: 6035013 (2000-03-01), Orava et al.
patent: 6047042 (2000-04-01), Khutoryansky et al.
patent: 6055292 (2000-04-01), Zeller et al.
patent: 6069935 (2000-05-01), Schick et al.
patent: 6081739 (2000-06-01), Lemchen
patent: 6093019 (2000-07-01), Morandi et al.
patent: 42 38 263 (1992-11-01), None
patent: 44 33 545 (1994-10-01), None
patent: 197 54 463 (1997-08-01), None
patent: 19823958 (1998-05-01), None
patent: 0 229 497 (1987-07-01), None
patent: 0 234 603 (1987-07-01), None
patent: 0 408 167 (1989-07-01), None
patent: 0 373 717 (1990-06-01), None
patent: 0 574 368 (1993-12-01), None
patent: 0 673 623 (1994-03-01), None
patent: 0 632 994 (1994-05-01), None
patent: 0 634 671 (1994-05-01), None
patent: 0 632 995 (1994-06-01), None
patent: 0 685 201 (1995-05-01), None
patent: 0 776 149 (1996-11-01), None
patent: 0756416 (1997-02-01), None
patent: 0 858 773 (1998-02-01), None
patent: 2304017 (1996-12-01), None
patent: 62 222 780 (1987-09-01), None
patent: 11188033 (1999-07-01), None
patent: WO 89/07322 (1989-08-01), None
patent: WO 90/14793 (1990-12-01), None
patent: WO 91/15786 (1991-10-01), None
patent: WO 93/23952 (1992-11-01), None
patent: WO 93/11707 (1992-12-01), None
patent: WO 93/00046 (1993-01-01), None
patent: WO 93/00649 (1993-01-01), None
patent: WO 93/14418 (1993-07-01), None
patent: WO 94/12855 (1994-06-01), None
patent: WO 96/32064 (1996-10-01), None
patent: WO 98/24059 (1998-06-01), None
patent: WO 98/56214 (1998-12-01), None
patent: WO 99/17659 (1999-04-01), None
patent: WO 99/62404 (1999-12-01), None
E.R. Fossum, R.H. Nixon, D. Schick, “A 37×28mm 600k-Pixel CMOS APS Dental X-Ray Camera-On-A-Chip With Self-Triggered Readout”, 1998 IEEE International Solid State Circuits Conference, 1998, ISSC98/Session11/Image Sensors/Paper FA 11,3.
J.D. Cox, D.S. Langford, D.W. Williams, “Electronic interoral dental x-ray imaging system employing a direct sensing CCD array”, X-Ray Detector Physics and Applications II, 1993, pp. 38-47, SPIL vol. 2009.
Gianfranco Venturino
Rinaldi Gerardo
Rotondo Giuseppe
Church Craig E.
Gendex Corporation
Kiknadze Irakli
McNees Wallace & Nurick LLC
Sattizahn Brian T.
LandOfFree
Automatic x-ray detection for intra-oral dental x-ray... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic x-ray detection for intra-oral dental x-ray..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic x-ray detection for intra-oral dental x-ray... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3533742