Energy sensitive X-ray phase contrast imaging with a CdTe-Timepix3 detector
| Autor: | C. Navarrete, Michael Fiederle, M. Schuetz, Carlos Avila, Gerardo Roque, Alessandro Olivo, S. Procz, Julian Fey |
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| Rok vydání: | 2019 |
| Předmět: |
Photon
Materials science Pixel business.industry Detector Phase-contrast imaging 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Photon counting Semiconductor detector 010309 optics Optics X-Ray Phase-Contrast Imaging 0103 physical sciences 0210 nano-technology business Energy (signal processing) |
| Zdroj: | 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). |
| DOI: | 10.1109/nss/mic42101.2019.9060044 |
| Popis: | The Timepix3 is a photon counting semiconductor detector that enables to simultaneously measure the energy and time of arrival of each incident X- ray photon. These properties, along with the high spatial resolution and high efficiency, due to the CdTe sensor material, can be exploited for several imaging applications, such as X-ray phase contrast imaging (XPCI).XPCI relies on the phase shift suffered by X-rays when traversing the sample. This study focuses on the free-space propagation XPCI and single mask edge illumination XPCI methods, which are two approaches that are well suited for laboratory implementations.Since both techniques are highly sensitive to charge-sharing, the Timepix3 energy and time information for each photon are used to minimize this effect by using pixel clustering methods. In addition, the performance of both XPCI techniques across a 30kVp source spectrum is studied using the energy-resolving capabilities of the detector. In both cases, the phase contrast and signal-to-noise ratio (SNR) are assessed as a function of different energy. Finally, it is demonstrated that phase contrast enhancement is feasible with pixel clustering and energy-selection for both XPCI techniques. |
| Databáze: | OpenAIRE |
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