It is the purpose of this article to outline briefly some of the newer concepts in the roentgenologic examination of the gastrointestinal tract, and to illustrate their application in the diagnosis of gastric carcinoma. The roentgenologic images obtained by these newer technics differ considerably from those obtained by the older method; the amount of useful information gleaned by using the newer technical process depends upon the examiner’s ability to apply that method and interpret the results.
In the early days of roentgenology the gastrointestinal tract was examined either by studying a series of films exposed with the patient in various positions or by fluoroscopic observations after filling the organ with an opaque mixture. Attempts to devise a procedure retaining the advantages, but eliminating the disadvantages, of each method led to the development of a special instrument, “the filming fluoroscope.”
The filming fluoroscope, as its name implies, is an instrument designed not only for the fluoroscopic examination of a patient but also for the exposing of films under fluoroscopic control. The instrument is sometimes called the “spot fluoroscope,” because in some of the commercial varieties the exposed portion of the film is small and circular. For nearly a quarter of a century Forssell, Ackerland, Berg, Chaoul, and numerous other European authors have been writing about the instrument, the special technics developed for its use, and the interpretation of the fluoroscopic and film images. Until recently, most American radiologists have looked upon films as relatively unimportant adjuncts to the fluoroscopy. This attitude. . .