Performance trade-off analysis comparing different front-end configurations for a digital x-ray imager
Citation
Kuhls-Gilcrist A, Jain A, Bednarek DR, Rudin S. Performance Trade-Off Analysis Comparing Different Front-End Configurations for a Digital X-ray Imager. IEEE Nucl Sci Symp Conf Rec. Published online October 30, 2010:2491–2494. doi:10.1109/NSSMIC.2010.5874235.
Keywords
- Digital X-ray Imagers
- Front-End Configurations
- Performance Trade-Off Analysis
- CsI Scintillators
- Fiber Optic Tapers (FOTs)
- Quantum Detection Efficiency (QDE)
- Modulation Transfer Function (MTF)
- Detective Quantum Efficiency (DQE)
- Spatial Resolution
- Sensitivity
Brief
The study examines the performance trade-offs of various front-end configurations, including different thicknesses and types of CsI scintillators and fiber optic tapers with varying magnification ratios, for use in indirect digital x-ray imagers.
Summary
This article investigates the performance trade-offs of different front-end configurations in digital x-ray imagers. The authors studied six different columnar structured CsI(Tl) scintillators with varying thicknesses and types, and four different FOTs (fiber optic tapers) with different magnification ratios. They used an EMCCD sensor with 8 μm pixels as the imaging sensor. The study found that thinner CsI scintillators had better resolution but lower quantum detection efficiency (QDE). Higher magnification FOTs increased the field-of-view but reduced sensitivity and MTF (modulation transfer function). The study concluded that 1000 μm, 500 μm, and 350 μm high-resolution CsI had the highest DQE (detective quantum efficiency) for low, medium, and high spatial frequencies, respectively. Larger FOT magnification ratios led to reduced DQE.
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