[The complete colon examination (author's transl)].

The radiologist must assume complete responsibility for the preparation and examination of the entire colon including the rectum. He must cooperate with and constantly check his findings with the colonoscopist. When one considers the increasing patient load, we cannot expect that all radiologists will be willing or able to assume the additional effort to produce Welin's precise results routinely. However, even with these examiners, the air contrast method can still fulfill the role of a precise and ultimate examination, especially in certain selected high risk groups. What Dr. Leo Rigler has said about lung cancer also applies to tumors of the colon. No matter how great or sophisticated the mental ability and our tools in differential diagnosis, it is all in vain if we do not find the lesion. Not to find the lesion is the irrevocable error.