Digital Method To Evaluate The Noise Of X-Ray Image Intensifiers

H. Roehrig; B. Lum; D. Fisher; D. Ouimette; M. P. Capp; M. M. Frost; S. Nudelman

doi:10.1117/12.958204

26 December 1979 Digital Method To Evaluate The Noise Of X-Ray Image Intensifiers

H. Roehrig, B. Lum, D. Fisher, D. Ouimette, M. P. Capp, M. M. Frost, S. Nudelman

Proceedings Volume 0206, Recent and Future Developments in Medical Imaging II; (1979) https://doi.org/10.1117/12.958204
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A novel method has been developed to evaluate the noise of x-ray image intensifiers. Fast electronics and a fast photomultiplier tube (PMT) are optically coupled to the output of an x-ray image intensifier. The light emission induced in the intensifier by the absorption of x-ray photons is measured by counting single PMT photoelectrons. The fluctuation in the number of counted PMT photoelectrons per absorbed monochromatic x-ray photon is a measure of the noise of the x-ray image intensifier. It is characterized by an efficiency factor called DQEscin whose values have been obtained from PMT count distributions for five x-ray energies. Experimental results reveal that the output signal-to-noise ratio of the x-ray image intensifier under study is reduced by no more than 10% as expected from the efficiency factor DQEscin.

Citation Download Citation

H. Roehrig, B. Lum, D. Fisher, D. Ouimette, M. P. Capp, M. M. Frost, and S. Nudelman "Digital Method To Evaluate The Noise Of X-Ray Image Intensifiers", Proc. SPIE 0206, Recent and Future Developments in Medical Imaging II, (26 December 1979); https://doi.org/10.1117/12.958204

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