Investigation of anorectal disorders has become a very wide field reaching from case history and simple plain radiography to advanced techniques such as defecography, nuclear medicine, endosonography, computed tomography, and magnetic resonance imaging. The place and value of defecography, thedynamic demonstration of bowel evacuation, have not previously been clearly defined. In this highly illustrated volume, radiologists experienced in thisfield describe techniques, radiation risks, and the interpretation of normal and abnormal findings using the aforementioned techniques of investigation....