1.1 This document describes the appearance of a radio-graphic image where fundamental components of image qual-ity are changed, that is, variables such as whether an X-ray orgamma ray source was used, the characteristics of the radio-graphic film (gradient, granularity, and developing conditions)and intensifying screens, and specimen thickness (the geo-metrical configuration ofthe radiographic set-up and focal spotsize both affect image quality but are not considered in thereference radiographs).
