[The fundamental problems and evaluation criteria for rational imaging diagnosis in oncology].

The increasing number of imaging procedures in the oncological diagnostics requires the rational and economic reasonable use of these methods. To avoid an "overdiagnosis" due to the use of multiple expensive methods for the same diagnostic problem, precise information about the cost-benefit-risk relations are necessary and should be available for radiologists, oncologists and other authorities. The aim is to receive a fast and more reliable diagnosis with lower risk and burden for the patients in reasonable expense. As a result may be the reduction of less effective outmoded methods. This paper formulates basic considerations which can be used for further more detailed and intensive investigations for establishing a rational diagnosis.