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Performance of a Micro-CT System: Characterisation of Hamamatsu X-ray source L10951-04 and flat panel C7942CA-22
KTH, School of Technology and Health (STH).
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Prestanda hos ett Micro-CT System : Karaktärisering av Hamamatsu röntgenkälla L10951-04 och plattpanel C7942CA-22 (Swedish)
Abstract [en]

This master thesis evaluated the performance of a micro-CT system consisting of Hamamatsu microfocus X-ray source L10951-04 and CMOS flat panel C7942CA-22. The X-ray source and flat panel have been characterised in terms of dark current, image noise and beam profile. Additionally, the micro-CT system’s spatial resolution, detector lag and detector X-ray response have been measured. Guidance for full image correction and methods for characterisation and performance test of the X-ray source and detector is presented.

A spatial resolution of 7 lp/mm at 10 % MTF was measured. A detector lag of 0.3 % was observed after ten minutes of radiation exposure. The performance of the micro-CT system was found to be sufficient for high resolution X-ray imaging. However, the detector lag effect is strong enough to reduce image quality during subsequent image acquisition and must either be avoided or corrected for.

Place, publisher, year, edition, pages
2014. , 53 p.
TRITA-STH, 2014:87
Keyword [en]
micro-CT, computed tomography, flat panel, characterisation, performance evaluation, Hamamatsu, image correction
National Category
Medical Engineering
URN: urn:nbn:se:kth:diva-155454OAI: diva2:761213
Subject / course
Medical Engineering
Educational program
Master of Science in Engineering - Medical Engineering
Available from: 2014-11-05 Created: 2014-11-05 Last updated: 2014-11-05Bibliographically approved

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