X-ray or gamma ray systems or devices – Specific application – Absorption
Reexamination Certificate
2011-03-22
2011-03-22
Song, Hoon (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Absorption
C378S207000
Reexamination Certificate
active
07912177
ABSTRACT:
An efficient X-ray radiographic method for recognition of materials of inspected objects and a corresponding device with improved functional possibilities are proposed, ensuring direct determination of the effective atomic number Zeffof the material, its density and thickness, as well as chemical composition. In customs inspection this should ensure practically unambiguous identification of explosives and drugs, and in medical tomography—early diagnostics of cancer tumors, osteoporosis, atherosclerosis and other dangerous and widespread diseases. The method includes X-raying of the inspected objects and recording of the transmitted radiation in several different spectral ranges with different effective energy by multi-element radiation receivers. For this purpose, quasimonochromatic X-ray radiation is used, and detection of radiation transmitted through the inspected object is made by spatially separated multi-element radiation receivers of selective sensitivity, upon each of which quasimonochromatic radiation of specified energy is directed. The background signal values in the absence of the inspected object are pre-recorded for each of said receiver elements under X-ray irradiation of specified energy, and signal values obtained in X-raying of a set of test objects are recorded. All the obtained signals are then normalized with respect to said background signals, and calibration constants are determined, after which the material is recognized by the obtained radiographic reflexes accounting for said calibration constants using special algorithms.
REFERENCES:
patent: 4571491 (1986-02-01), Vinegar et al.
patent: 6081579 (2000-06-01), Nagano et al.
patent: 6212253 (2001-04-01), Schedel-Niedrig et al.
patent: 6445765 (2002-09-01), Frank et al.
patent: 6816572 (2004-11-01), Jabri et al.
patent: 7020241 (2006-03-01), Beneke et al.
patent: 7134786 (2006-11-01), Settergren et al.
patent: 7190757 (2007-03-01), Ying et al.
patent: 7218706 (2007-05-01), Hopkins et al.
patent: 7236559 (2007-06-01), Jha et al.
patent: 7330532 (2008-02-01), Winsor
patent: 2007/0014471 (2007-01-01), Simanovsky et al.
patent: 2007/0025505 (2007-02-01), Bjorkholm
patent: 2007/0183568 (2007-08-01), Kang et al.
patent: 2008/0205594 (2008-08-01), Bjorkholm
patent: 2095795 (1997-11-01), None
patent: 2171980 (2001-08-01), None
patent: 1583806 (1988-07-01), None
patent: 1639272 (1992-06-01), None
patent: 44547 (2002-02-01), None
patent: 80455 (2009-02-01), None
Grinyov et al., “Dual energy radiography of bone tissues using ZnSe-based scintielectronic detectors,” Nuclear Instruments and Methods in Physics Research, A, 571 (2007) 399-403.
Harrison, “Digital radiography—a review of detector design,” Nuclear Instruments and Methods in Physics Research, A 310 (1991) 24-34.
Naydenov et al., “Detection of organic materials by spectrometric radiography method,” Los Alamos Archives, http://arxiv.org/abs/0810.0563, printed Aug. 21, 2009.
Naydenov et al., Direct reconstruction of the effective atomic number of materials by the method of multi-energy radiography, Nuclear Instruments and Methods in Physics Research, B, 215 (2004), 552-560.
Naydenov at al., “Multi-energy approach in radiography and introscopy,” Nuclear Instruments and Methods in Physics Research, A, 537 (2005), 462-466.
Naydenov, et al., “Multi-Energy Radiography Against Terrorism, Theory and Experiments,” Los Alamos Archives, http://lanl.arxiv.org/abs/physics/0504170, visited Jun. 25, 2009.
Ryzhikov et al, A spectrometric approach in radiography for detection of materials by their effective atomic number, Nuclear Instruments and Methods in Physics Research, A,603 (2009), 349-354.
Ryzhikov et al., “Multi-energy radiography on the basis of ‘scintillator=photodiode’ detectors,” Nuclear Instruments and Methods in Physics Research, A, 505 (2003) 549-551.
Grynyov Boris Viktorovich
Naydenov Sergei Vyacheslavovich
Ryzhikov Volodymyr Diomydovych
Institute of Scintillation Materials, National Academy of Scienc
Kinney & Lange , P.A.
Song Hoon
LandOfFree
X-ray radiographic method of recognition of materials and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with X-ray radiographic method of recognition of materials and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray radiographic method of recognition of materials and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2668489