A physical model of xeroradiography is described which predicts a visible and measureable effect of the x-ray radiation noise. Agreement between the theoretical and experimental magnitudes of the developed radiation noise and its dependence on the exposure energy is excellent. The results imply xeroradiography is capable in principle of the ultimate in sensitivity providing the photoreceptor absorbs all the incident x-rays.
F. W. Schmidlin,
"Physical Theory of Xeroradiography and the Observation of Photon Noise," Optical Engineering 15(4), 154344 (1 August 1976). https://doi.org/10.1117/12.7971990