Patent ReferencesX-ray diagnostic apparatus Baggage inspection system X-ray scanner for detecting plastic articles Radiographic image processing method and photographic imaging apparatus therefor Automatic concealed object detection system having a pre-scan stage Luggage inspection device Dynamic volume scanning for CT scanners Device and method for inspection of baggage and other objects Automatic concealed object detection system having a pre-scan stage Apparatus for and method of measuring geometric, positional and kinematic parameters of a rotating device having a plurality of interval markers AbstractThe disclosed dual energy baggage scanning assembly includes a CT scanning system, and a conveyor belt for transporting items through the CT scanning system, and an improved power supply for the X-ray source of the CT scanner so that a dual energy beam is provided. The power supply alternately powers the X-ray tube of the scanning system at high and low voltage levels at a predetermined rate and comprises at least one high voltage DC power supply for providing a stable, high DC voltage the X-ray tube; means, including at least one waveform generator, for providing a periodic time varying waveform; and coupling means, including a transformer, for coupling the waveform generator to said DC voltage supply so that the total voltage across the cathode and anode of the tube is periodically changed between the high and low voltage levels at the predetermined rate in response to the periodic time varying waveform provided by the waveform generator.Other References
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