Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Reexamination Certificate
2006-07-14
2010-11-16
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
Reexamination Certificate
active
07834321
ABSTRACT:
A radiographic imaging apparatus for taking X-ray images of an object includes a front panel and back panel. The panels have substrates, arrays of signal sensing elements and readout devices, and passivation layers. The front and back panels have scintillating phosphor layers responsive to X-rays passing through an object produce light which illuminates the signal sensing elements to provide signals representing X-ray images. The X-ray apparatus has means for combining the signals of the X-ray images to produce a composite X-ray image. Furthermore, the composition and thickness of the scintillating phosphor layers are selected, relative to each other, to improve the diagnostic efficacy of the composite X-ray image. Alternatively, a radiographic imaging apparatus has a single panel having arrays of signal sensing elements and readout devices and scintillating phosphor layers that are disposed on both sides of a single substrate.
REFERENCES:
patent: 2254033 (1941-08-01), Fitzgerald
patent: 4356398 (1982-10-01), Komaki et al.
patent: 4737641 (1988-04-01), Lange et al.
patent: 4855598 (1989-08-01), Ohgoda et al.
patent: 4896037 (1990-01-01), Shimura et al.
patent: 4900652 (1990-02-01), Dickerson et al.
patent: 5021327 (1991-06-01), Bunch et al.
patent: 5108881 (1992-04-01), Dickerson et al.
patent: 5138167 (1992-08-01), Barnes
patent: 5221843 (1993-06-01), Alvarez
patent: 5237176 (1993-08-01), Ito
patent: 5262649 (1993-11-01), Antonuk et al.
patent: 5402338 (1995-03-01), Ito
patent: 5650626 (1997-07-01), Trauernicht et al.
patent: 5753921 (1998-05-01), Trauernicht et al.
patent: 5825032 (1998-10-01), Nonaka et al.
patent: 6016356 (2000-01-01), Ito et al.
patent: 6167110 (2000-12-01), Possin et al.
patent: 6285740 (2001-09-01), Seely et al.
patent: 7263165 (2007-08-01), Ghelmansarai
patent: 2002/0070365 (2002-06-01), Karellas
patent: 2004/0155198 (2004-08-01), Miyata et al.
patent: 2006/0151708 (2006-07-01), Bani-Hashemi et al.
Antonuk et al., “Thin-Film, Flat-Panel, Composite Imagers for Projection and Tomographic Imaging”, Sep. 1994, IEEE, Transactions on Medical Imaging, vol. 13, No. 3, pp. 482-490.
P. C. Bunch, “Performance characteristics of asymmetric zero-crossover screen-film system,” Proc. SPIE 1653, 46 (1992).
C. C. Shaw, T. P. Wang, D. S. Breitenstein, and D. Gur, “Improvement of signal-to-noise and contrast-to-noise ratios in dual-screen computed radiography,” Med. Phys. 24, 1293 (1997).
C. C. Shaw, X. Liu, S. Chardon, and J. M. Herron, “Frequency dependent DQE in dual-screen CR imaging,” Proc. SPIE 3336, 684 (1998).
J. A. Rowlands and J. Yorkston, “Flat panel detectors for digital radiography,” In Handbook of Medical Imaging, vol. 1, Physics and Psychophysics, Edited by J. Beutel, H. L. Kundel, and R. L. Van Metter (SPIE Press, Bellingham, WA, 2000), pp. 223-328.
R. A. Kruger, J. D. Armstrong, J. A. Sorenson, and L. T. Niklason, “Dual energy film subtraction technique for detecting calcification in solitary pulmonary nodules,” Radiology 140, 213 (1981).
J.-T. Ho and R. A. Kruger, “Dual energy film subtraction technique for bone contrast suppression in chest radiography,” Proc. SPIE 914, 531 (1988).
J. M. Sabol, G. B. Avinash, F. Nicolas, B. Claus, J. Zhao, and J. T. Dobblins III, “The development and characterization of a dual-energy subtraction imaging system for chest radiography based on CsI:T1 amorphous silicon flat-panel technology,” Proc. SPIE 4320, 399 (2001).
R. Guillemaud, C. Robert-Coutant, M. Darboux, J.-J. Gageliu, and J.-M. Dinten, “Evaluation of dual-energy radiography with a digital x-ray detector,” Proc. SPIE 4320, 469 (2001).
J. C. Lapp, “Glass substrates for AMLCD applications: properties and implications,” Technical Information Paper 101, Corning Inc., 1997.
J. C. Lapp, “AMLCD substrates trends in technology,” Technical Information Paper 102, Corning Inc., 2003.
Schott North America Inc. web site: www.us.schott.com.
J. M. Mace, “Polyester film as a substrate for electronic imaging,” IS&T's 46th Annual Conference, p. 371, 1993.
W. Ito, K. Shimura, N. Nakajima, H. Ishida, and H. Kato, “Improvement of detection in computed radiography by new single-exposure dual-energy subtraction,” J. of Dig. Img. 6, 42, (1993).
Thomas E. Hartman, “Dual-Energy Radiography,” Seminars in Roentgenology, vol. 32, No. 1, Jan. 1, 1997, pp. 45-49.
Stewart et al., “Single-exposure dual-energy computed radiography,” Medical Physics, AIP, vol. 17, No. 5, Sep. 1, 1990, pp. 866-875.
Wojcik Timothy J.
Yip Kwok-Leung
Yorkston John
Carestream Health Inc.
Kim Kiho
Porta David P
LandOfFree
Apparatus for asymmetric dual-screen digital radiography does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for asymmetric dual-screen digital radiography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for asymmetric dual-screen digital radiography will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4246971