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1 July 2009 Energy discriminating x-ray camera utilizing a cadmium telluride detector
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An energy-discriminating x-ray camera is useful for performing monochromatic radiography using polychromatic x rays. This x-ray camera was developed to carry out K-edge radiography using iodine-based contrast media. In this camera, objects are exposed by a cone beam from a cerium x-ray generator, and penetrating x-ray photons are detected by a cadmium telluride detector with an amplifier unit. The optimal x-ray photon energy and the energy width are selected out using a multichannel analyzer, and the photon number is counted by a counter card. Radiography was performed by the detector scanning using an x-y stage driven by a two-stage controller, and radiograms obtained by energy discriminating are shown on a personal computer monitor. In radiography, the tube voltage and current were 60 kV and 36 μA, respectively, and the x-ray intensity was 4.7 μGy/s. Cerium K-series characteristic x rays are absorbed effectively by iodine-based contrast media, and iodine K-edge radiography was performed using x rays with energies just beyond iodine K-edge energy 33.2 keV.
©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Eiichi Sato, Abderyim Purkhet, Hiroshi Matsukiyo, Akihiro Osawa, Toshiyuki Enomoto, Manabu Watanabe, Jiro Nagao, Seiitiro Nomiya, Keitaro Hitomi, Etsuro Tanaka, Toshiaki Kawai, Shigehiro Sato, Akira Ogawa, and Jun Onagawa "Energy discriminating x-ray camera utilizing a cadmium telluride detector," Optical Engineering 48(7), 076502 (1 July 2009).
Published: 1 July 2009


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