focal-film distance


fo·cal-film dis·tance

(FFD) (fōkăl film distăns) The distance from the source of radiation (the focal spot of the x-ray tube) to the film or other image-receptor.
Synonym(s): source-to-image distance.

fo·cal-film dis·tance

(FFD) (fōkăl film distăns) The distance from the source of radiation (the focal spot of the x-ray tube) to the film or other image-receptor.
Synonym(s): source-to-image distance.