AbstractsEngineering
Performance of a Micro-CT System; Prestanda hos ett Micro-CT System
| Institution: | KTH Royal Institute of Technology |
|---|---|
| Department: | |
| Year: | 2014 |
| Keywords: | micro-CT; computed tomography; flat panel; characterisation; performance evaluation; Hamamatsu; image correction; Engineering and Technology; Medical Engineering; Teknik och teknologier; Medicinteknik; Civilingenjörsexamen - Medicinsk teknik; Master of Science in Engineering - Medical Engineering; Medical Engineering; Medicinsk teknik |
| Record ID: | 1338568 |
| Full text PDF: | http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155454 |
Abstract
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.
