Influence of Radiation Dose on Image Quality
- 1 March 1979
- journal article
- research article
- Published by SAGE Publications in Acta Radiologica. Diagnosis
- Vol. 20 (2), 393-399
- https://doi.org/10.1177/028418517902000212
Abstract
When the speed of a recording medium is doubled the background quantum mottle is increased by a factor square root 2. However, the signal/noise ratio is changed not in proportion to the square root of the exposure, but in a linear fashion, i.e. by a factor 2. The change in the depiction of objects with a very high attenuation difference in relation to its surroundings appears not to be linear, but proportional to the square root of the exposure. Such objects (metal wire meshes, lead bar grids) should thus be avoided in routine evaluation of image quality since they give incomplete information as to image impairment when high-speed recording media are used.Keywords
This publication has 4 references indexed in Scilit:
- Testing of Roentgen Film QualityActa Radiologica. Diagnosis, 1978
- High-Density Failure of Radiographic FilmsActa Radiologica. Diagnosis, 1977
- Influence of Secondary Radiation on Image QualityActa Radiologica. Diagnosis, 1975
- COMPARISON OF SEVERAL METHODS FOR EVALUATING IMAGE QUALITY OF RADIOGRAPHIC SCREEN-FILM SYSTEMSAmerican Journal of Roentgenology, 1966