A new system of computed radiography that is based on new concepts and the latest computer technologies has been developed. This system eliminates the drawbacks of conventional screen-film radiography. The basic principle of the system is the conversion of the x-ray energy pattern into digital signals utilizing scanning laser stimulated luminescence (SLSL).

The erasable phosphor imaging plate developed for medical radiography has found new uses in the laboratory. X-ray diffraction, protein crystallography and autoradiography have all benefited from this technology transfer from the clinic.

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Single crystals of normalBaFX:Eu2+ phosphors have been prepared. Optical absorption spectra and stimulation spectra measured with polarized light are in good agreement with each other. The experimental ESR spectra of the F−‐rich and X−‐rich undoped normalBaFX powder phosphors which have been x‐rayed coincide with the calculated spectra of F(X−) and F(F−) centers, respectively. In addition, the decrease of the ESR signal intensity with light exposure is substantially in agreement with the stimulation spectra for each case. It is concluded that the PSL of normalBaFX:Eu2+ phosphors is caused by the liberation of electrons trapped at F centers created by the x‐ray exposure.