Evaluation of an ultra-fast photon-counting energy-resolved ASIC for spectral CT
2012 (English)In: Progress in Biomedical Optics and Imaging - Proceedings of SPIE, SPIE - International Society for Optical Engineering, 2012, Vol. 8313, 83130Y- p.Conference paper (Refereed)
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.
Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2012. Vol. 8313, 83130Y- p.
, Progress in Biomedical Optics and Imaging, ISSN 1605-7422 ; 8313
ASIC, photon counting, silicon strip detector, spectral CT, Computed Tomography, Count rate performance, Count rates, Energy information, Energy resolutions, Flux rates, Low flux, Photon flux, Photon-counting mode, Polychromatic x-rays, Silicon Strip Detectors, Ultra-fast, Application specific integrated circuits, Computerized tomography, Medical imaging, Photons
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-98181DOI: 10.1117/12.911111ISI: 000304768000031ScopusID: 2-s2.0-84859345239ISBN: 978-081948962-3OAI: oai:DiVA.org:kth-98181DiVA: diva2:536833
Medical Imaging 2012: Physics of Medical Imaging; San Diego, CA;5 February 2012 through 8 February 2012
QC 201206252012-06-252012-06-202012-07-16Bibliographically approved