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Modeling the performance characteristics of computed radiography (CR) systems
Srinivasan Vedantham1, Andrew Karellas
1Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655, USA. srinivasan.vedantham@umassmed.edu
IEEE Transactions on Medical Imaging
|March 5, 2010
Summary
This study models computed radiography (CR) image formation using storage phosphors. The model accurately predicts image quality metrics, aiding in the development of advanced digital radiography and mammography systems.
Area of Science:
- Medical Imaging Physics
- Digital Radiography Systems
Background:
- Computed radiography (CR) with storage phosphors is a key technology in digital radiography and mammography.
- Accurate modeling of CR image formation is crucial for optimizing image quality and system performance.
Purpose of the Study:
- To develop and validate a model for the image formation process in a single-side read "flying spot" CR system.
- To assess objective image quality metrics, including modulation transfer function (MTF) and detective quantum efficiency (DQE), using the developed model.
Main Methods:
- Employed a cascaded linear systems approach to model the CR image formation process.
- Utilized Monte Carlo methods for estimating various parameter values within the model.
- Focused on a granular phosphor material in a single-side read "flying spot" CR system.
Main Results:
- The developed model demonstrated good agreement with published empirical data for objective image quality metrics.
- Successfully predicted modulation transfer function and detective quantum efficiency for the CR system.
Conclusions:
- The proposed model provides a valuable tool for understanding the impact of storage phosphor properties and CR reader parameters on image quality.
- This work facilitates the optimization of existing CR systems and the development of next-generation digital radiography technologies.
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