Application of an oscillation-type linear cadmium telluride detector to enhanced gadolinium K-edge computed tomography
✍ Scribed by Hiroshi Matsukiyo; Eiichi Sato; Osahiko Hagiwara; Abulajiang Abudurexiti; Akihiro Osawa; Toshiyuki Enomoto; Manabu Watanabe; Jiro Nagao; Shigehiro Sato; Akira Ogawa; Jun Onagawa
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 887 KB
- Volume
- 632
- Category
- Article
- ISSN
- 0168-9002
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✦ Synopsis
A linear cadmium telluride (CdTe) detector is useful for carrying out energy-discrimination X-ray imaging, including computed tomography (CT). To perform enhanced gadolinium K-edge CT, we used an oscillation-type linear CdTe detector with an energy resolution of 1.2 keV. CT is performed by repeating the linear scan and the rotation of an object. Penetrating X-ray photons from the object are detected by the CdTe detector, and event signals of X-ray photons are produced using charge-sensitive and shaping amplifiers. Both the photon energy and the energy width are selected using a multichannel analyzer, and the number of photons is counted by a counter card. In energy-discrimination CT, tube voltage and current were 80 kV and 20 mA, respectively, and X-ray intensity was 1.55 mGy/s at 1.0 m from the source at a tube voltage of 80 kV. Demonstration of enhanced gadolinium K-edge X-ray CT was carried out by selecting photons with energies just beyond gadolinium K-edge energy of 50.3 keV.