Radiant energy – Source with recording detector – Including a light beam read-out
Reexamination Certificate
2011-08-30
2011-08-30
Porta, David (Department: 2884)
Radiant energy
Source with recording detector
Including a light beam read-out
Reexamination Certificate
active
08008642
ABSTRACT:
A computed radiography system including a stimulating light source such as a laser, a photostimulable glass imaging plate (PGIP) substantially transparent to the stimulating light positioned such that the stimulating light impinges the PGIP perpendicularly thereto producing photostimulated luminescence light (PLL), a light collector having a light reflecting inner surface proximate the PGIP for collecting PLL emitted from the PGIP and having a hole or slot therein for admitting stimulating light into the light collector and onto the PGIP. An optical filter in communication with the light collector for blocking stimulating light waves and passing PLL therethrough. A light detector receives PLL from the optical filter and the light collector, mechanism providing relative movement between the PGIP and the stimulating light source, and mechanism including an analog to digital converter for converting the collected and detected PLL to a diagnostic readout. The system is particularly useful in mammography.
REFERENCES:
patent: 4987304 (1991-01-01), Kulpinski et al.
patent: 5140160 (1992-08-01), Boutet et al.
patent: 5541421 (1996-07-01), Brandt et al.
patent: 5596202 (1997-01-01), Arakawa
patent: 5665962 (1997-09-01), Kimura
patent: 6180955 (2001-01-01), Doggett et al.
patent: 6352949 (2002-03-01), Willems et al.
patent: 2005/0006608 (2005-01-01), Koren
patent: 2005/0139794 (2005-06-01), Kerr et al.
patent: 2005/0274917 (2005-12-01), Ishisaka
patent: 2005/0285062 (2005-12-01), Gerstlauer et al.
patent: 2006/0054845 (2006-03-01), Satoh et al.
patent: 2006/0124876 (2006-06-01), Kahlert et al.
A. R. Lubinsky et al., Storage Phosphor System for Computed Radiography: Screen Optics, Proc. SPIE 626, 120-132, (1986).
Robert K. Swank, Absorption and Noise in X-Ray Phosphors, J. Appl. Phys., vol. 44, No. 9, 4199-4203, (1973).
G. Chen et al., Fluorozirconate-based Nanophase Glass Ceramics for High-Resolution Medical X-ray Imaging, J. Non-Crystalline Solids 352, 610-614, (2006).
G. Chen et al., Insights into Phase Formation in Fluorochlorozirconate Glass-Ceramic Storage Phosphors, Appl. Phys. 88, 191915, 2006.
J.T. Dobbins, DQE(f) of Four Generations of Computed Radiography Acquisition Devices, Med. Phys. 22 (10),1581-1593, (1995).
A. Edgar et al., Photostimulated Luminescence in a Rare Earth-Doped Fluorobromozirconate Glass Ceramic, Appl. Phys. Letters 75, No. 16, 2386-2388, (1999).
A. Edgar et al., Structural Phase Changes in Barium Bromide . . . Glass Ceramic X-ray Storage Phosphor, J. Phys.: Condens, Matter 13, 6259-6269, (2001).
A. Edgar et al., Optical Properties of a High Efficiency Glass Ceramic X-ray Storage Phospor, Radiation Measurements 38, 413-416, (2004).
A. Edgar et al., Spatial Resolution of a Glass-Ceramic X-ray Storage Phosphor, Current Applied Physics 6, 399-402, (2006).
H. Fujita et al., Accurate Measurement of Characteristic Curves . . . Aluminum Stepwedge Technique, Medical Physics, vol. 13 (6), 922-924 (1986).
B.E. Kinsman et al., Preparation and Purification of Metal Fluorides for Crystals and Glasses, Adv. Mat. for Optics and Electronics, vol. 5, 109-115 (1995).
G. Lubberts, Random Noise Produced by X-Ray Fluorescent Screens, Journal of the Optical Society of America, vol. 58, 11, 1475-1483, (1968).
S. Obenauer et al., Dose Reduction in Full-Field Digital Mammography: an Anthropomorphic Breast Phantom Study, British Journal of Radiology 76, 478-482 (2003).
J.M. Parker, Fluoride Glasses, Annual Reviews Material Science, vol. 19, 21-41 (1989).
J.A. Rowlands, The Physics of Computed Radiography, Physics in Medicine and Biology, vol. 47, R123-R166 (2002).
J.S. Sanghera et al., Effect of Aluminum Fluoride on the Physical Properties and Stability . . . Glasses, Journal American Ceramic Society vol. 73, No. 9, 2677-83 (1990).
S. Schweizer, Review Article—Physics and Current Understanding of X-Ray Storage Phosphors, Phys. Stat. Sol. (a) 187, No. 2, 335-393 (2001).
S. Schweizer et al., Photostimulated Luminescence in Eu-doped Fluorochlorozirconate Glass Ceramics, Applied Physics Letters, vol. 83, No. 3, 449-451, (2003).
S. Schweizer et al., Photostimulated Luminescence From Fluorochlorozirconate Glass Ceramics and the Effect of Crystallite Size, J. Appl Phys vol. 97, (2005).
M. Secu et al., Photostimulated Luminescence From A Fluorochlorozirconate . . . Effect of Crystallite Size and Phase, J. of Physics: Condensed Matter (15), 1097-1108, (2003).
M. M. Broer, Melting Apparatus for the Synthesis of Bulk ZrF4-Based Fluoride Glass, J. Am. Ceram. Soc. 72 (3), 492-495, (1989).
W. G. Ji et al.; Digital X-Ray Imaging Using Amorphous Selenium: Reduction of Aliasing, Med. Phys. 25 (11) 2148-2162, (1998).
W. Zhao et al., Digital Radiology Using Active Matrix Readout of Amorphous Selenium: Theoretical Analysis of Detective Quantum Efficiency, Med. Phys. 24 (12) 1819-1833, (1997).
J. H. Siewerdsen et al., Signal, Noise Power Spectrum, and Detective Quantum Efficiency . . . Flat-Panel Imagers for Diagnostic RadioIogy, Med. Phys. 25 (5) 614-628, (1998).
J. H. Siewerdsen et al., Empirical and Theoretical Investigation of the Noise . . . Flat-Panel Imagers (AMFPIs) for Diagnostic Radiology, Med. Phys. 24 (1) 71-89, (1997).
A. D. A. Maidment et al., Analysis of the Spatial-Frequency-Dependent DQE of Opticaly Coupled Digital Mammography Detectors, Med. Phys. 21 (6) 721-729, (1994).
R. M. Nishikawa et al., Scanned-Projection Digital Mammography, Med. Phys. 14 (5), 717-727, (1987).
R. Schaetzing et al., Digital Imaging in Diagnostic Radiology, Digital Radiography Using Storage Phosphors, Ed. J.D. Newell and C.A. Kelsey, Churchill Livingstone, NY, (1990).
Johnson Jacqueline A.
Lubinsky Anthony R.
Schweizer Stefan
Baker David S
Olson & Cepuritis, Ltd.
Porta David
UChicago Argonne LLC
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