[Theoretical investigations for optimising the quantum in radiodiagnosis (author's transl)]

On the basis of the present calculations, it is possible to determine the optimal exposure energies for any object of combination of materials. The results of the present investigation contradict present day practice. Calculated energies are sometimes much higher than those employed at present. This has certain definite advantages; reduced radiation dose to the object; a less sharp decline of contrast with high kilovoltage. Unfortunately it is only possible to guess at the causes of this difference. Further investigations, dealing particularly with the effect of spectral energy distribution under certain conditions, are in progress. Investigations into the sensitivity of intensifiers and film/screen combinations, combined with a comparison with calculated energies would be valuable.