Measurement of the Photon Fluence for the Evaluation of Photon Detection Efficiency of Photon Counting Sensor

Title & Authors
Measurement of the Photon Fluence for the Evaluation of Photon Detection Efficiency of Photon Counting Sensor
Park, Ji-Koon; Heo, Ye-Ji; Kim, Kyo-Tae; Noh, Si-Cheol; Kang, Sang-Sik;

Abstract
Recently, the various digital X-ray imaging devices using CCD and TFT LCD-based flat panel digital X-ray sensor are being used. In particular, a number of studies on photon counting sensor technique have been reported. In this study, the incident X-rays fluence on the photon counting sensor material was measured to estimate photon detection efficiency which is the quantitative performance evaluation factor of photon counting sensor. The result of measuring the photon fluence by using RQA-M2 Radiation beam quality of IEC 61223-1-2 recommendations, the incident photon fluence could be defined as about $\small{4 photons/(0.01mm)^2{\cdot}{\mu}Gy}$ within $\small{10{\mu}m}$ pin-hole area, and about $\small{50photons/(0.03mm)^2{\cdot}{\mu}Gy}$ within $\small{30{\mu}m}$ pin-hole area, and about $\small{698photons/(0.1mm)^2{\cdot}{\mu}Gy}$ within $\small{100{\mu}m}$ pin-hole area. Consequently, with the previously setup of the incident fluence, the measuring of actual photon counting efficiency by observing the output waveform of the photon counting sensor material was considered possible.
Keywords
Language
Korean
Cited by
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