Abstract

There are various types of responses that results, in x-ray film radiography. This types of outcomes of responses, can be determined from the film – gamma of an x-ray radiographic film, as described in this work. The optical densities (OD) of the films were obtained using an instrument, the densitometer, and the values were averaged as the mean optical density (ODMean). These ODMean , were converted to the absorbed dose, X in milli Gray (mGy). By considering a dose reference X0 in mGy and finding the small contrast in dose ∆X in mGy, the value of the film – gamma, 𝛤, was obtained from a relation. The results of the film – gamma, shows a range of values from 0.78 to 4.89. For films with 𝛤 < 1, were found to be Ultra speed film, those with 𝛤 > 3, the films were said to be Fast speed film, and those whose 𝛤 is between 2 to 3, were seen to be Standard speed film. The films whose film – gamma was between 2 to 3, makes a good film selection for use.