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Preliminary evaluat...
Preliminary evaluation of a silicon strip detector for photon-counting spectral CT
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- Xu, Cheng (författare)
- KTH,Medicinsk bildfysik,AlbaNova University Centre
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- Danielsson, Mats (författare)
- KTH,Medicinsk bildfysik,AlbaNova University Centre
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- Karlsson, Staffan (författare)
- KTH,Medicinsk bildfysik,AlbaNova University Centre
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- Svensson, Christer (författare)
- Linköpings universitet,Elektroniska komponenter,Tekniska högskolan
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- Bornefalk, Hans (författare)
- KTH,Medicinsk bildfysik,AlbaNova University Centre
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(creator_code:org_t)
- Elsevier BV, 2012
- 2012
- Engelska.
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Ingår i: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 677, s. 45-51
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- An edge-on silicon strip detector designed for photon-counting spectral computed tomography (CT) is presented. Progress on the development of an application specific integrated circuit (ASIC) to process the pulses and sort them into energy bins is reported upon. The ASIC and detector are evaluated in terms of electronic noise, energy resolution, count rate linearity under high-frequency periodic pulses, threshold variation and gain. The high-frequency periodic pulses are injected both by means of an external pulse generator and a pulsed laser illuminating the silicon diode. The pulsed laser system has similar to 100 ps pulse width and thus generates near instantaneous pulses in the diode, thus mimicking real X-ray conversions. The evaluation shows a low thermal noise level of 0.77 key RMS, an energy resolution of 1.5 keV RMS when electron-hole pairs are generated in the detector diode by the laser injection. The test results furthermore indicate a good energy-discriminating capability of the detector with the thresholds spread out, assigning the external pulses to higher and higher energy bins as the pulse intensity is increased.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering (hsv//eng)
Nyckelord
- Photon counting
- Silicon strip detector
- ASIC
- Spectral computed tomography
- Laser test
- TECHNOLOGY
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- art (ämneskategori)
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