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Proceedings Paper

Evaluation of an ultra-fast photon-counting energy-resolved ASIC for spectral CT
Author(s): Cheng Xu; Moa Yveborg; Han Chen; Mats Danielsson; Staffan Karlsson; Christer Svensson; Hans Bornefalk
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Paper Abstract

We have developed an ultra-fast photon-counting energy-resolved application specific integrated circuit (ASIC) for spectral computed tomography (CT). A comprehensive characterization has been carried out to investigate the performance of the ASIC in terms of energy resolution under different photon flux rates and the count rate linearity in photon-counting mode. An energy resolution of 4.7 % has been achieved for 59.5 keV low flux photons. The count rate performance of the ASIC was measured with 120 kVp polychromatic x-rays. The results indicate that the count rate linearity can be kept for a flux rate up to 150 Mphotons s-1 mm-2 with retained energy information, and this value is increased to be 250 Mphotons s-1 mm-2 in photon-counting mode.

Paper Details

Date Published: 8 March 2012
PDF: 6 pages
Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83130Y (8 March 2012); doi: 10.1117/12.911111
Show Author Affiliations
Cheng Xu, Royal Institute of Technology (Sweden)
Moa Yveborg, Royal Institute of Technology (Sweden)
Han Chen, Royal Institute of Technology (Sweden)
Mats Danielsson, Royal Institute of Technology (Sweden)
Staffan Karlsson, Royal Institute of Technology (Sweden)
Christer Svensson, Linköping Univ. (Sweden)
Hans Bornefalk, Royal Institute of Technology (Sweden)

Published in SPIE Proceedings Vol. 8313:
Medical Imaging 2012: Physics of Medical Imaging
Norbert J. Pelc; Robert M. Nishikawa; Bruce R. Whiting, Editor(s)

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