Energy-sensitive X-ray radiography and charge sharing effect in pixelated detector
- NázevTitle
- Energy-sensitive X-ray radiography and charge sharing effect in pixelated detectorEnergy-sensitive X-ray radiography and charge sharing effect in pixelated detector
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- J. Jakůbek
- Klíčová slovaKeywords
- pixel detector, X-ray radiography, Material recognition
- DOIDOI
- 10.1016/j.nima.2009.03.148
- Časopis / citaceJournal / citation
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 607(1), 192-195 (2009) · ISSN 0168-9002
- RokYear
- 2009
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Příprava, modifikace a charakterizace materiálů energetickým zářenímPreparation, Modification and Characterization of Materials by Energetic Radiation; Využití radionuklidů a ionizujícího zářeníApplication of radionuclides and ionising radiation
- CitovánoCited by
- 78 (OpenAlex)
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
The possibility of per pixel energy measurement presents a substantial advantage for X-ray radiography with polychromatic X-ray sources allowing material identification via analysis of transmission energy spectra. The energy resolution of the pixelated planar detector is, however, influenced by charge sharing. The ionization charge generated by the particle (X-ray photon) can be collected by several pixels, forming a cluster. If the fraction of the charge collected by a particular pixel drops below the energy threshold it is not counted and therefore it is lost. This fact, together with the presence of noise, limits the energy resolution of the device. A simplified model of the charge sharing effect is studied in this work and compared with experimental data. The application of a energy-calibrated TimePix detector in the field of energy-sensitive X-ray radiography enables the recognition of soft biological materials (fat and muscle tissue) which is presented here.
The possibility of per pixel energy measurement presents a substantial advantage for X-ray radiography with polychromatic X-ray sources allowing material identification via analysis of transmission energy spectra. The energy resolution of the pixelated planar detector is, however, influenced by charge sharing. The ionization charge generated by the particle (X-ray photon) can be collected by several pixels, forming a cluster. If the fraction of the charge collected by a particular pixel drops below the energy threshold it is not counted and therefore it is lost. This fact, together with the presence of noise, limits the energy resolution of the device. A simplified model of the charge sharing effect is studied in this work and compared with experimental data. The application of a energy-calibrated TimePix detector in the field of energy-sensitive X-ray radiography enables the recognition of soft biological materials (fat and muscle tissue) which is presented here.