scope:

Concepts are described generally, however, so that they can be applied to other radiographic imaging modalities. In treating radiographic image quality, the report covers resolution, noise, and contrast. The treatment of transfer function analysis encompasses linearity and shift invariance, point spread function, line spread function, convolution, modulation transfer function (MTF) and Fourier spectrum. Various methods for the measurement of MTFs of screen-film systems and factors affecting MTFs, such as crossover exposure and x-ray beam quality are also treated. Appendices to the report provide mathematical derivations and a glossary.