A Discussion of Sensitivity and MTF of the Two Kinds of KODAK High Speed Dental X-Ray Film

Abstract

Evaluation of the photographic characteristics on the two kinds of Kodak dental X-ray film, Ektaspeed film and Ultraspeed film, is done by means of characteristic curve and MTF (Modulation Transfer Function) curve in this study. The results obtained are as follows : 1. The photographic sensitivity of Ektaspeed film is 1.90 times that of Ultraspeed film. 2. The photographic contrast of Ektaspeed film is higher than that of Ultraspeed film. 3. MTF of Ektaspeed film is a little lower than that of Ultraspeed film.