[Diagnostic strategies of the small and large intestine].

The selection and sequence of different diagnostic procedures, such as abdominal X-ray, contrast roentgenography, ultrasonography, endoscopy and angiography, depend on the presenting symptoms and the presumptive diagnosis. In addition, the acuteness of the disease and the requirements for planning the operation determine the diagnostic time course. Novel image processing devices, such as endosonography and computerized tomography, may improve diagnosis, especially in rectal diseases. Successful outcome of diagnostic examinations can be achieved only by differentiated use of radiologic and endoscopic methods.