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I-IMAS: A 1.5D sensor for high-resolution scanning

Abstract

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.

Category

Academic article

Language

English

Author(s)

  • A. Fant
  • P. Gasiorek
  • R. Turchetta
  • Berit Sundby Avset
  • A. Bergamaschi
  • D. Cavouras
  • I. Evangeloue
  • M.J. French
  • A. Galbiati
  • H. Georgiou
  • G. Hall
  • G. Iles
  • J. Jones
  • R. Longo
  • N. Manthos
  • M.G. Metaxas
  • M. Noy
  • Joar Martin Østby
  • F. Psomadellis
  • G.J. Royle
  • Helene Schulerud
  • R.D. Speller
  • P.F. van der Stelt
  • S. Theodoridis
  • F. Triantis
  • C. Venanzi

Affiliation

  • CCLRC Rutherford Appleton Laboratory
  • SINTEF Digital / Microsystems and Nanotechnology
  • University of Trieste
  • National Technical University of Athens
  • University of Ioannina
  • University College London
  • Imperial College London
  • SINTEF Digital / Connectivity Technologies and Platforms
  • Greece
  • SINTEF Digital / Smart Sensor Systems
  • Netherlands

Year

2007

Published in

Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment

ISSN

0168-9002

Volume

573

Issue

1-2

Page(s)

27 - 29

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