CHARACTERISING THE EOS SLOT-SCANNING SYSTEM WITH THE EFFECTIVE DETECTIVE QUANTUM EFFICIENCY
A H Clavel1, P Monnin2, J M Létang3
1Institute of Radiation Physics, CHUV, Rue du Grand-Pré 1, CH-1007 Lausanne, Switzerland Université de Lyon, CREATIS, CNRS UMR5220, Inserm U1044, INSA-Lyon, Université Claude Bernard Lyon 1, Centre Léon Bérard, Lyon, France EOS imaging, 10 rue Mercœur, 75011 Paris, France aclavel@eos-imaging.com.
Radiation Protection Dosimetry
|November 6, 2015
Summary
The EOS system
Area of Science:
- Medical Imaging Physics
- Radiological Technology Assessment
Background:
- Standard detective quantum efficiency (DQE) is limited when comparing systems with scatter rejection.
- Effective DQE (eDQE) provides a better metric for systems incorporating scatter reduction.
- The EOS slot-scanning system inherently rejects scattered radiation due to its geometry.
Purpose of the Study:
- To characterize the EOS system's imaging performance using effective DQE (eDQE).
- To evaluate the EOS system under clinical-like imaging conditions.
- To compare the EOS system's eDQE with other digital radiography systems.
Main Methods:
- The EOS system was tested using phantoms of varying widths.
- Measurements were performed across a range of incident air kerma and tube voltages.
- Scatter fractions and eDQE were calculated for different configurations.
Main Results:
- Scatter fractions in EOS images were consistently low, approximately 2%.
- Maximum eDQE values ranged from 9% to 14.8% across tested conditions.
- The EOS system demonstrated superior performance compared to many digital radiography systems with anti-scatter grids.
Conclusions:
- The EOS system exhibits excellent scatter rejection capabilities.
- Effective DQE (eDQE) is a suitable metric for evaluating the EOS system's performance.
- The EOS system shows promising results for medical imaging applications.
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