This volume is a comprehensive study of the pharynx, esophagus, stomach and duodenum. Considerable importance is attached to the use of films, fluoroscopic detail and the filming fluoroscope in the roentgen examination of these structures. Although more attention is directed to films than has been customary in many departments, careful and accurate fluoroscopic technic is not neglected.
The apparatus and the technic of examination are discussed in detail. If these two chapters were carefully studied, many undetected lesions would be clearly demonstrated. The normal anatomy and physiology and the pathologic changes produced by disease in the upper part of the digestive tract are considered. In chapter IV, "Basic Principles of Interpretation," the factors of importance in the study of the rugal pattern are discussed. Chapter VII, "Pathologic Changes Giving Rise to Roentgenologic Signs of Disease," explains the abnormal roentgen appearance as it is affected by anatomic and physiologic changes.