Two-dimensional CdTe photon counting imager for hard x-ray

Toru Aoki; Hisashi Morii; Gosuke Ohashi; Yasuhiro Tomita; Yoshinori Hatanaka

doi:10.1117/12.683423

30 August 2006 Two-dimensional CdTe photon counting imager for hard x-ray

Toru Aoki, Hisashi Morii, Gosuke Ohashi, Yasuhiro Tomita, Yoshinori Hatanaka

Proceedings Volume 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII; 63190K (2006) https://doi.org/10.1117/12.683423
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Two dimension real-time radiation imaging device for the hard ray with photon-counting type CdTe radiation detector was researched and developed. It is a device with the 35×35 arranged 1225 pixels including a virtual pixel in pixel pitch 1/10-inch pitch. All pixels are independently connected by original ASIC, and it has the energy distinction ability with five energy thresholds. The desecrated CdTe diodes were adopted in the photoelectric conversion elements by using eight ASIC of original development with maximum count rate 2Mcps / pixel and 5 energy distinction thresholds in this prototype. This prototype is a portable type device that can be the room temperature operation, it is possible to connect it with the laptop computer as a camera device of two dimension type to be able to take move of a real-time scene (an actual frame rate depends on signal conditioning PC) via USB2.0. The imaging area is about 3.5-inch corner. This time, it has been understood to be able to detect slight information that has tended to be overlooked up to now because it is possible to take picture of Am241, Co57, and Cs137 simultaneously, to try the animation taking picture that distinguishes three isotopes, and to set the best range of each at the same time as being able to distinguish these three kinds by the energy distinction clearly. It characterizes in corresponding to an incidence rate at the X-ray tube level, and it corresponds to taking picture of the animation of the penetration image that uses X rays.

Citation Download Citation

Toru Aoki, Hisashi Morii, Gosuke Ohashi, Yasuhiro Tomita, and Yoshinori Hatanaka "Two-dimensional CdTe photon counting imager for hard x-ray", Proc. SPIE 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII, 63190K (30 August 2006); https://doi.org/10.1117/12.683423

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KEYWORDS

Imaging systems

Sensors

X-ray imaging

X-rays

Prototyping

Photon counting

Diodes

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