1986 Volume 42 Issue 2 Pages 290-297
Physical characteristics and diagnostic utilities were evaluated in testing imaging techniques for exclusive chest radiograms using a new ortho-type film. As a result, these film-screen systems showed low gamma, gradient, subject contrast and relative speed, and good RMS and wide latitude. Visual detectability of acryl and line beads and air images with Burger's phantom was increased when using a low tube voltage (60-80 kV). In chest radiograms using an 80 kV tube voltage and an 8 : 1 grid ratio, images of calcification, micronodule, interstice and bronchiole were better visualized and the quality of mediastinal images were as good as those of high-voltage chest radiograms. From the information yielded by our study, exclusive chest radiogram with a low-voltage technique seems worth developing for chest radiography.