focal-film distance


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Related to focal-film distance: collimation, milliamperage, FFD

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.