X-ray or gamma ray systems or devices – Specific application – Absorption
Reexamination Certificate
2011-06-07
2011-06-07
Ho, Allen C. (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Absorption
C378S098900, C378S098110
Reexamination Certificate
active
07957506
ABSTRACT:
A dual energy x-ray imaging system searches a moving automobile for concealed objects. Dual energy operation is achieved by operating an x-ray source at a constant potential of 100 KV to 150 KV, and alternately switching between two beam filters. The first filter is an atomic element having a high k-edge energy, such as platinum, gold, mercury, thallium, lead, bismuth, and thorium, thereby providing a low-energy spectrum. The second filter provides a high-energy spectrum through beam hardening. The low and high energy beams passing through the automobile are received by an x-ray detector. These detected signals are processed by a digital computer to create a steel suppressed image through logarithmic subtraction. The intensity of the x-ray beam is adjusted as the reciprocal of the measured automobile speed, thereby achieving a consistent radiation level regardless of the automobile motion. Accordingly, this invention provides images of organic objects concealed within moving automobiles without the detritus effects of overlying steel and automobile movement.
REFERENCES:
patent: 4454606 (1984-06-01), Relihan
patent: 4626688 (1986-12-01), Barnes
patent: 4987581 (1991-01-01), Bernardi
patent: 5253282 (1993-10-01), Pelc
patent: 5481584 (1996-01-01), Tang et al.
patent: 5661774 (1997-08-01), Gordon et al.
patent: 5687210 (1997-11-01), Maitrejean et al.
patent: 5692028 (1997-11-01), Geus et al.
patent: 5838758 (1998-11-01), Krug et al.
patent: 5838759 (1998-11-01), Armistead
patent: 5910973 (1999-06-01), Grodzins
patent: 6031890 (2000-02-01), Bermbach et al.
patent: 6094467 (2000-07-01), Gayer et al.
patent: 6192101 (2001-02-01), Grodzins
patent: 6249567 (2001-06-01), Rothschild et al.
patent: 6269142 (2001-07-01), Smith
patent: 6292533 (2001-09-01), Swift et al.
patent: 6459764 (2002-10-01), Chalmers et al.
patent: 6507025 (2003-01-01), Verbinski et al.
patent: 6542580 (2003-04-01), Carver et al.
patent: 6757008 (2004-06-01), Smith
patent: 6843599 (2005-01-01), Le et al.
patent: 6920197 (2005-07-01), Kang et al.
patent: 6922461 (2005-07-01), Kang et al.
patent: 6928141 (2005-08-01), Carver et al.
patent: 7010094 (2006-03-01), Grodzins et al.
patent: 7084901 (2006-08-01), Smith
patent: 7103137 (2006-09-01), Seppi et al.
patent: 7133491 (2006-11-01), Bernardi et al.
patent: 7257188 (2007-08-01), Bjorkholm
patent: 7302035 (2007-11-01), Hu et al.
patent: 7322745 (2008-01-01), Agrawal et al.
patent: 7336767 (2008-02-01), Le
patent: 7352843 (2008-04-01), Hu et al.
patent: 7352844 (2008-04-01), Muenchau et al.
patent: 7366282 (2008-04-01), Peschmann
patent: 7379530 (2008-05-01), Hoff et al.
patent: 7386092 (2008-06-01), Kang et al.
patent: 7397891 (2008-07-01), Johnson et al.
patent: 7408160 (2008-08-01), Verbinski et al.
patent: 7453987 (2008-11-01), Richardson
patent: 7463715 (2008-12-01), Spahn
patent: 7483510 (2009-01-01), Carver et al.
patent: 7483518 (2009-01-01), Hamill
patent: 7486768 (2009-02-01), Allman et al.
patent: 7486769 (2009-02-01), Brondo, Jr.
patent: 7526064 (2009-04-01), Akery
patent: 7551715 (2009-06-01), Rothschild et al.
patent: 7555099 (2009-06-01), Rothschild et al.
patent: 2005/0084073 (2005-04-01), Seppi et al.
patent: 2006/0140341 (2006-06-01), Carver et al.
patent: 2007/0064868 (2007-03-01), Kostka et al.
patent: 2007/0140423 (2007-06-01), Foland
patent: 2008/0292050 (2008-11-01), Goodenough et al.
patent: 2009/0147913 (2009-06-01), Dragon et al.
patent: 0 059 382 (1985-08-01), None
patent: 0 491 977 (1994-06-01), None
patent: 2 277 013 (1994-10-01), None
International Search Report and Written Opinion for Application No. PCT/US2009/038903, 10 pp., dated Dec. 1, 2009 (mailing date).
Ho Allen C.
King & Spalding LLP
Spectrum San Diego, Inc.
LandOfFree
Automobile scanning system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automobile scanning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automobile scanning system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2672016