Title :
CMOS X-ray Image Sensor Array
Author :
Silva, J. ; Lanceros-Mendez, S. ; Minas, G. ; Rocha, J.G.
Author_Institution :
Univ. of Minho, Guimaraes
Abstract :
This paper describes a pixel array for x-rays imaging consisting in an 8×8 photodiode array fabricated in CMOS technology, with the respective readout circuit. Above the photodiodes, an array of scintillating CsI:Tl crystals are placed. So, the x-ray energy is first converted to visible light by the scintillating crystals, which is then detected by the photodiodes. The photocurrent produced by each photodiode is amplified, converted to a voltage and stored in a capacitor. Finally, the voltage of each capacitor is read by the readout circuit.
Keywords :
CMOS image sensors; X-ray imaging; photodiodes; power capacitors; power convertors; readout electronics; sensor arrays; solid scintillation detectors; CMOS technology; CMOS x-ray image sensor array; capacitor; photodiode array; pixel array; readout circuit; scintillating crystals; voltage converter; x-ray energy; x-ray imaging; CMOS image sensors; CMOS technology; Capacitors; Circuits; Crystals; Image sensors; Photodiodes; Sensor arrays; Voltage; X-ray imaging;
Conference_Titel :
Electronics, Circuits and Systems, 2007. ICECS 2007. 14th IEEE International Conference on
Conference_Location :
Marrakech
Print_ISBN :
978-1-4244-1377-5
Electronic_ISBN :
978-1-4244-1378-2
DOI :
10.1109/ICECS.2007.4511178
