High speed signal processing for photon counting X-ray detection

• Autorzy: Shinomiya B. , Koike A. , Morii H. , Okunoyama T. , Neo Y. , Mimura H. , Aoki T.
• Konferencja: 8th International Conference on Global Research and Education – Inter-Academia 2009
• Języki publikacji: EN

Abstrakty

EN

Recently practical X-ray measurement systems are demanded energy distinction function. Photon-counting CdTe semiconductor detectors have a high energy resolution in a low count rate condition at room temperature. However, the energy resolution is decreased by pile-up phenomenon in a high count rate condition. In conventional signal processing, processing time estimated X-ray photon energy from the pulse waveform is about tens of microseconds. This time is depended on the pulse decay time. This paper purposes to maintain the high energy resolution by changing the signal-processing algorithm, which derived the pulse rise height of the output waveform from the CdTe detector in a high count rate condition. As a result, the pulse rise time required to estimate the pulse rise height was short about 100 ns at incident X-ray energy 60 keV. As the result of energy spectrum by using this data, the FWHM of about 11keV (at 60 keV) when the count rate of 500 kcps. This result shows the possibility that the photon counting sensor has application for the high count rate imaging without decrease of the high energy resolution.

Słowa kluczowe

EN

X-ray; CdTe; photon counting

• Wydawca: Łukasiewicz Industrial Research Institute for Automation and Measurements PIAP
• Czasopismo: Journal of Automation Mobile Robotics and Intelligent Systems
• Rocznik: 2009
• Tom: Vol. 3, No. 4
• Strony: 143--146
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Shinomiya B.

autor

Koike A.

autor

Morii H.

autor

Okunoyama T.

autor

Neo Y.

autor

Mimura H.

autor

Aoki T.

• Research Institute of Electronics, Shizuoka University, Hamamatsu, Japan,

Bibliografia

• [1] Nilaura M., Nakamura A., Aoki T., Hatanaka Y., Phys. Stat. Sol. B, no. 229, 2002, pp. 83-87.
• [2] Aoki T., Ishida Y., Sakashita D., Gnatyuk V.A., Nakamura A., Tomita Y., Hatanaka Y., Temmyo J., ”Development of energy discriminated CdTe imaging detector for hard Xray”. In: Proc. SPIE 5540, 2004, pp. 196-205.
• [3] Aoki T., et al., IDW/AD’05, 2005, p. 4283.
• [4] Zou W., Nakashima T., Onishi Y., Koike A., Shinomiya B., Morii H., Neo Y., Mimura H., Aoki T., “Atomic Number and Electron Density Measurement Using Conventional X-ray Tube and a CdTe Detector”.Japanese Journal of Applied Physics, vol. 47, no. 9, 2008, pp. 7317-7323.
• [5] Ohno Y., Torikoshi M., Tsunoo T., Hyodo K., “Dual-energy X-ray CT with CdTe array and its extension”. Nuclear Instruments and Methods in Physics Research Section A, no. 548, 2005, pp. 72-77.
• [6] Torikoshi M., Tsunoo T., Endo M., Noda K., Kumada M., Yamada S., Soga F., Hyodo K., “Design of synchrotron light source and its beamline dedicated to dual-energy X-ray computed tomography”, Journal of Biomedical Optics, vol. 6(3), 2001, pp. 371-377.