What is the x-ray grid exposure factor

The amount of exposure that is increased by using a x ray grid to absorb the scattered light reaching the film.
The x ray grid absorbs the scattered rays as well as the primary rays. In order to ensure that the amount of irradiation reaching the film remains unchanged, the exposure time must be prolonged.
The filter factor is equal to the ratio of the exposures using and not using the filter grating. It is called the filter grating (exposure) factor or the x ray grid (light) coefficient. The filtration coefficient can be measured by the model.
Because of the shadow of the scattering line, the filter factor will increase with the increase of the thickness of the object and the increase of the photographic voltage.

Author：X Ray Grids Maker