Related Experiment Video
Updated: Aug 5, 2025
12:24
Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
Published on: July 17, 2012
12.5K
Characterization of a CdTe single-photon-counting detector for biomedical imaging applications
Luca Fardin1, Camilla Giaccaglia2, Paolo Busca1
1European Synchrotron Radiation Facility, Grenoble, France.
Summary
The Eiger 2X CdTe 1M-W detector shows high detection efficiency and good spatial resolution for synchrotron imaging. Its performance is suitable for low-dose biomedical applications.
Area of Science:
- Medical Imaging
- Synchrotron Radiation Technology
- Photon Counting Detectors
Background:
- Advancements in detector technology are crucial for enhancing biomedical imaging.
- Single photon counting detectors offer superior performance for X-ray applications.
Purpose of the Study:
- To characterize the Eiger 2X CdTe 1M-W detector for synchrotron-based imaging.
- Evaluate detector performance across various photon energies and flux levels.
Main Methods:
- Measurements included linearity, Modulation Transfer Function (MTF), Noise Power Spectrum (NPS), and Detective Quantum Efficiency (DQE).
- Characterization was performed at the European Synchrotron Radiation Facility's biomedical beamline ID17.
- Tests covered photon energies from 26-80 keV and varying photon fluxes.
Main Results:
- High linearity was observed within the manufacturer's specified flux range.
- Detection efficiency exceeded 60% up to 80 keV.
- Spatial resolution was generally compatible with the 75 μm pixel size, with some degradation near Cd and Te K-edges.
- Time-dependent sensor response was noted, mitigated by low photon fluxes (<2x10^8 ph mm^-2 s^-1).
Conclusions:
- This is the first characterization of the Eiger 2X CdTe 1M-W detector using monochromatic synchrotron radiation.
- The detector's spatial resolution and quantum efficiency make it suitable for low-dose imaging applications.
