all of us perform gastrointestinal studies in a differ­ ent manner, this text provides an excellent overview. The reader will discover that the text is especially well written and focuses on the important issues relating to GI contrast studies. Because Dr. Steven­ son's group performs endoscopic procedures, they are included in the manual. These authors are recognized scholars and leaders in gastrointesti­ nal radiology. Thus, it is easy to understand why the manual is so well done. I am particularly impressed with the emphasis placed on the patient-radiologist relationship before, during, and after completion of a study. All of us who teach gastrointestinal radiology are concerned about the decline in the number of gastrointestinal contrast studies. We are not sure how we can continue to teach our residents the proper tech­ niques and maintain high-quality teaching programs in gastrointesti­ nal radiology. A manual of this type is thus timely and appropriate. The manual will be a valuable addition to the library of all radiologists. It will be particularly useful for residents who are learning how to per­ form GI contrast studies.

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