K K Andersen, H M Carstensen
OBJECTIVE: To examine the rationale for and necessity of adjusting the film focal distance when X-ray angulation is employed during a radiographic study, and to determine the sensitivity of human interpreters to overall differences in film density and the correlation, if any, with digital analysis of radiographic films. DESIGN AND SETTING: The study was performed in the radiology department at Logan College of Chiropractic in St. Louis, Missouri. A standard X-ray phantom of the hand and wrist and several aluminum step wedges were exposed from 10% to 250% of baseline exposure intensity using equipment commonly found in a field doctor's practice...
May 1998: Journal of Manipulative and Physiological Therapeutics