Περίληψη:
We have developed a 1.5 D CMOS active pixel sensor to be used in conjunction with a scintillator for X-ray imaging. Within the Intelligent Imaging Sensors (I-ImaS) project, multiple sensors will be aligned to form a line-scanning system and its performance evaluated with respect to existing sensors in other digital radiography systems. Each sensor contains a 512×32 array of pixels and the electronics to convert the collected amount of charge to a digital output value. These include programmable gain amplifiers (PGAs) and analogue-to-digital converters (ADCs). The gain of the PGA can be switched between one or two, to increase the sensitivity for smaller collected charge; the ADC is a 14-bit successive approximation with a sampling rate of 1.25 MHz. The ASIC includes a programmable column fixed pattern noise mitigation circuit and a digitally controllable pixel reset mode block. Here we will describe the sensor design and the expected performance. © 2006 Elsevier B.V. All rights reserved.
Συγγραφείς:
Fant, A.
Gasiorek, P.
Turchetta, R.
Avset, B.
Bergamaschi, A.
Cavouras, D.
Evangelou, I.
French, M.J.
Galbiati, A.
Georgiou, H.
Hall, G.
Iles, G.
Jones, J.
Longo, R.
Manthos, N.
Metaxas, M.G.
Noy, M.
Ostby, J.M.
Psomadellis, F.
Royle, G.J.
Schulerud, H.
Speller, R.D.
van der Stelt, P.F.
Theodoridis, S.
Triantis, F.
Venanzi, C.
Περιοδικό:
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Λέξεις-κλειδιά:
CMOS integrated circuits; Gain control; Mammography; Phosphors; Radiography; Scanning, Advanced pixel sensors; Dental radiography; Detector design; Digital radiography, Sensors
