Characterization of a CdTe single-photon-counting detector for biomedical imaging applications
| Autor: | Luca Fardin, Camilla Giaccaglia, Paolo Busca, Alberto Bravin |
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| Přispěvatelé: | Fardin, L, Giaccaglia, C, Busca, P, Bravin, A |
| Rok vydání: | 2023 |
| Předmět: |
Photon Counting Detector
Synchrotron Radiation Cadmium Telluride High-Energy Biophysics Biomedical Imaging Eiger 2X FIS/07 - FISICA APPLICATA (A BENI CULTURALI AMBIENTALI BIOLOGIA E MEDICINA) General Physics and Astronomy Monochromatic Radiation Radiology Nuclear Medicine and imaging General Medicine |
| Zdroj: | Physica Medica. 108:102571 |
| ISSN: | 1120-1797 |
| Popis: | Purpose: The Eiger 2X CdTe 1 M−W (Dectris ltd, Baden, Switzerland) single photon counting detector was characterized for imaging applications at the biomedical beamline ID17 of the European Synchrotron Radiation Facility. Methods: Linearity, Modulation Transfer Function, Noise Power Spectrum and Detective Quantum Efficiency were measured as a function of photon energy and flux in the range 26–80 keV. Results: The linearity was confirmed in the flux range specified by Dectris and a detection efficiency higher than 60 % was measured for energies up to 80 keV. The spatial resolution was inferred from the Modulation Transfer Function and was found to be compatible with the pixel size of the detector (75 μm), except at energies just above the K-edge of Cd and Te where it reached 150 μm. The study of the Noise Power Spectrum showed a time-dependency in the response of the sensor, which is mitigated at low photon fluxes ( |
| Databáze: | OpenAIRE |
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