This 3rd Edition describes and illustrates double contrast techniques for the diagnosis of diseases affecting the upper gastrointestinal tract, small bowel and colon. Co-edited by three of the world's leading gastrointestinal radiologists with an outstanding group of contributors, this reference explains the principles of examination. It describes how to perform the techniques in each area of the GI tract and guides the reader in interpreting the resulting radiographs. Devotes entire chapters to specific areas of the GI tract (pharynx, esophagus, stomach, duodenum, small bowel, and colon) and the technical aspects of studies specific to those areas, including pharyngography, esophagography, upper GI examinations, small bowel enemas (enteroclysis), and barium enemas. Includes important sections on the double contrast barium enema and the diagnosis of colorectal neoplasms and cancers that reflect growing national interest in colon cancer screening techniques. Features detailed, clearly labeled images that illustrate both normal anatomy and the abnormalities discussed in the text. Includes new sections on HIV esophagitis; Helicobacter pylori gastritis and the relationship of H. pylori to peptic ulcer disease; and gastric MALT lymphoma, an early, curable form of gastric lymphoma. Details the advantages of using digital fluoroscopic imaging to perform and interpret double contrast studies.