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SNR and DQE analysis of broad spectrum X-ray imaging
Abstract
A general analysis of the signal to noise ratio SNR, of X-ray imaging with a broad spectrum is presented. The analysis indicates that the energy modulation of the signal together with its degree of matching by the energy response of the image receptor are significant determinants of the SNR for signal detection. This requires a generalisation of the interpretation of detective quantum efficiency, DQE, the transfer function appropriate from SNR, that will be dependent on the image detection or discrimination task. The generalised DQE is similar to the conventional DQE for the task of detecting radiation levels, but may differ substantially from it for the task of discriminating a lesion from its surround, particularly for signals of bone or iodine. The photon counter is shown to be inferior to the ideal detector for these tasks, but to be generally superior to the energy detecting scintillators used in conventional or digital radiography and computed tomography.
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Citations
Cited by
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Radiation dose reduction in computed tomography: techniques and future perspective
Yu, L., Liu, X., Leng, S., Kofler, J. M., Ramirez-Giraldo, J. C., Qu, M., Christner, J., Fletcher, J. G., & McCollough, C. H. (2009) · Imaging in Medicine · doi:10.2217/iim.09.5 · Cited by 395
Giger, M. L., Chan, H., & Boone, J. (2008) · Medical Physics · doi:10.1118/1.3013555 · Cited by 311
Image quality in CT: From physical measurements to model observers
Verdun, F. R., Racine, D., Ott, J. G., Tapiovaara, M. J., Toroi, P., Bochud, F. O., Veldkamp, W. J. H., Schegerer, A., Bouwman, R. W., Giron, I. H., et al. (2015) · Physica Medica · doi:10.1016/j.ejmp.2015.08.007 · Cited by 300
Self-citationSpektr: A computational tool for x‐ray spectral analysis and imaging system optimization
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Metadata
- Authors
- Tapiovaara, M. J., & Wagner, R.
- Venue
- Physics in Medicine and Biology
- Publisher
- IOP Publishing
- Published
- 1985-06-01
- Volume
- 30
- Issue
- 6
- Pages
- 519-529
- ISSN
- 0031-9155 (ISSN-L)
- OpenAlex
- W1973132483
- Cited by
- 228
- References
- 0
- FWCI
- 1.09
- Type
- journal article
- Language
- en
- Open access
- closed
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- Tapiovaara, M. J., & Wagner, R. (1985). SNR and DQE analysis of broad spectrum X-ray imaging. Physics in Medicine and Biology. https://doi.org/10.1088/0031-9155/30/6/002
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