Continuous high speed tomographic imaging system and method

  • US 6,236,709 B1
  • Filed: 05/04/1999
  • Issued: 05/22/2001
  • Est. Priority Date: 05/04/1998
  • Status: Active Grant
First Claim
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1. A continuous, high speed, tomographic imaging apparatus for detecting target objects contained within a moving package comprising:

  • a package conveying system for continuously conveying a package along a line of travel between a conveying system input end and a conveying system output end, first, second and third spaced CT scanning stations relatively spaced along said line of travel and positioned between the conveying system input and output ends for scanning said moving package in three different scan planes relatively spaced along said line of travel, each said CT scanning station including a plurality of spaced, stationary X-ray sources all positioned to project X-ray beams in the same scan plane and a stationary detector array positioned in opposed, spaced relationship to said X-ray sources, said detector array including a plurality of stationary, spaced detectors to receive X-ray beams projected from said X-ray sources in said scan plane and to provide CT data output signals which are a function of the received X-ray beams, said first CT scanning station operating in a scan plane which is vertically oriented relative to said line of travel, said second and third CT scanning stations each operating in a scan plane which is transverse to said line of travel, the X-ray sources of said second CT scanning station projecting beams from the right side of said line of travel to the left side thereof and the X-ray sources of said third CT scanning station projecting beams from the left side of said line of travel to the right side thereof, and a processing and analysis assembly connected to receive said detector CT output signals from the detector arrays of said first, second and third CT scanning stations, said processing and analysis assembly operating to analyze said CT data output signals to identify target objects.

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