[About the advantages of the sonographic diagnostic in the field of the radiologist (author's transl)].

1. Ultrasound techniques as a new diagnostical method are included in the work and administration of an already existing institution of a central hospital, i.e. the X-ray department. Avoiding a special organizational unit in the hospital or an organization depending on a department which e.g. a gynecology could not be asked to undertake (considering the amount of work and qualification needed) means an advantage from the economic point of view. 2. The radiologist is able to learn the interpretation of the B-Scan of the ultrasound method very quickly because the visual imagination necessary to handle both methods is the same. 3. Sonography is an important supplement for radiological diagnosis. 4. Suspecting a lesion of an retroperitoneal or intra-abdominal organ sonography can be used as the first check-up. Renal sonographie could prove to be a screening-method. Often the ultrasound finding indicates the further diagnostical procedures which are successful, saving X-rays and time. Under certain circumstances X-ray investigations can possibly be avoided. Considering the last two points would mean for the future that the radiologist indicates the diagnostical method to be used - not only the ultrasound but also the X-ray method. Five cases demonstrated confirm this conclusion.