Performance of a prototype 32x32 pixel indirect x-ray imager based on a lateral selenium passive pixel sensor

Rasoul Keshavarzi; Kai Wang; Mohammad Y. Yazdandoost; Kyung-Wook Shin; Feng Chen; Shaikh Hasibul Majid; Shiva Abbaszadeh; Karim S. Karim

doi:10.1117/12.912286

9 March 2012 Performance of a prototype 32×32 pixel indirect x-ray imager based on a lateral selenium passive pixel sensor

Rasoul Keshavarzi, Kai Wang, Mohammad Y. Yazdandoost, Kyung-Wook Shin, Feng Chen, Shaikh Hasibul Majid, Shiva Abbaszadeh, Karim S. Karim

Author Affiliations +

Proceedings Volume 8313, Medical Imaging 2012: Physics of Medical Imaging; 83135O (2012) https://doi.org/10.1117/12.912286
Event: SPIE Medical Imaging, 2012, San Diego, California, United States

Abstract

An interface has been developed to capture frames taken by X-ray array imagers up to 64×64 pixels. An application specific integrated circuit (ASIC) designed solely for X-ray flat panel imaging readout circuitry, manufactured by FLIR® called Indigo (also known as ISC9717), was used as part of charge-amplifier block. An Altera Cyclone II FPGA is used to serve three purposes: Create pulses required for gate-driver block, Receive fast-stream data coming from the Indigo chip, and Send data through RS-232 protocol over a serial cable to a personal computer. Initial results for a 32×32 passive pixel sensor (PPS) with lateral amorphous Selenium metal-semiconductor-metal (MSM) photodetector were presented in [1]. This work focuses more on methods used to improve the images obtained from the array. Sharper images produced in sync with the light source are presented. In addition, insight into array readout circuitry and capturing a frame from an array is discussed.

Citation Download Citation

Rasoul Keshavarzi, Kai Wang, Mohammad Y. Yazdandoost, Kyung-Wook Shin, Feng Chen, Shaikh Hasibul Majid, Shiva Abbaszadeh, and Karim S. Karim "Performance of a prototype 32×32 pixel indirect x-ray imager based on a lateral selenium passive pixel sensor", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83135O (9 March 2012); https://doi.org/10.1117/12.912286

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