A sensitometric comparison of Fuji Super HR-G and Kodak T-mat G panoramic films.
Film contrast, relative speed, and resolution of Fuji Super HR-G panoramic film were determined according to specifications of the American National Standards Institute and compared with those of Kodak T-mat G panoramic film. The films were simultaneously exposed by Kodak Lanex regular intensifying screens with time-scale sensitometry. Optical density was read with a digital densitometer, and characteristic curves were plotted and analyzed by polynomial and linear regression. The average gradients of the linear regression curves between 0.25 and 2.00 optical density units above base plus fog were taken as contrast (HR-G: 1.831, T-mat G: 1.712). Relative speed, when exposed with Lanex regular intensifying screens and calculated at 1.00 optical density unit above base plus fog, was 412 for HR-G. A speed of 400 was chosen for T-mat G to match Kodak consumer information. Resolution for both films was similar. These findings suggest that Fuji Super HR-G panoramic film develops similar contrast, speed, and resolution to Kodak T-mat G panoramic film.
Benson
B W
BW
Department of Diagnostic Sciences, Baylor College of Dentistry, Dallas, Tex, USA.
Frederiksen
N L
NL
D016014:Linear Models; D011857:Radiographic Image Interpretation, Computer-Assisted; D012044:Regression Analysis; D014962:X-Ray Film / Q000592:standards*; D014963:X-Ray Intensifying Screens