Development of the photon-counting 256ch CdTe line detector

Kenji Tokumori; Fukai Toyofuku; Shigenobu Kanda; Sueki Baba; Yoshio Mito; Kazuyuki Hyodo; Masami Ando; Chikao Uyama

doi:10.1117/12.368180

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6 October 1999 Development of the photon-counting 256ch CdTe line detector

Kenji Tokumori, Fukai Toyofuku, Shigenobu Kanda, Sueki Baba, Yoshio Mito, Kazuyuki Hyodo, Masami Ando, Chikao Uyama

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Proceedings Volume 3770, Medical Applications of Penetrating Radiation; (1999) https://doi.org/10.1117/12.368180
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We have developed a photon-counting 256ch CdTe line detector system for a monochromatic x-ray CT system using fluorescent x-rays generated by synchrotron radiation. The size of each detector element is 1.98 mm(w) X 1.98 mm(h) X 0.5 mm(t). Each element has two discriminators (an upper and a lower discriminator) and two 16-bit counters (an upper and a lower counter). Each discriminator rejects pulses having a pulse height lower than the chosen voltage limits. All pulses in between the upper and lower voltage limits were obtained by subtracting the upper counter value from the lower counter value. By changing the voltage limits, we can obtain an incident x-ray energy spectrum. Several energy spectra for the fluorescent x-ray and standard (gamma) -ray sources were measured by using this detector. The detector showed a sufficient energy resolution, and has been found to be suitable as a detector of monochromatic x-ray CT.

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Kenji Tokumori, Fukai Toyofuku, Shigenobu Kanda, Sueki Baba, Yoshio Mito, Kazuyuki Hyodo, Masami Ando, and Chikao Uyama "Development of the photon-counting 256ch CdTe line detector", Proc. SPIE 3770, Medical Applications of Penetrating Radiation, (6 October 1999); https://doi.org/10.1117/12.368180

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