Abstract
Roentgenologic evaluation of children has interpretative and technical limitations. The most common interpretative errors are based on films taken in hypoventilation or expiration and in rotation. An adequate roentgenologic examination is determined largely by the history and clinical findings. If there is a lack of correlation between the clinical and roentgenologic findings, the physician must treat the patient, not his film. Progress films aid in retrospective diagnosis and in following the course of the disease.