Das Projekt "Verringerung der Strahlenexposition von Patienten in der Roentgendiagnostik" wird vom Umweltbundesamt gefördert und von Universität Erlangen-Nürnberg, Institut für Medizinische Physik durchgeführt. The aim of this work is to assess the relationship between the radiation exposure of Interventional Radiology and the risk of alternative methods and to investigate the storage phosphor mammography considering to reduce the exposure. A central documentation of Interventional Radiology was started. More than 100 hospitals and medical surgical interventions are included. All kinds of interventional techniques were taken into account with this questionnaire. Additionally to the questions of radiation exposure parameters, like time of fluoroscopy and number and kind of images, exemplary dose measurements have to be done. The standard data of the angiographic unit will be gathered, too. The mean values of the measured and calculated organ and effective dose equivalents and total absorbed energy enable to compare the risk of cancer induced by radiation to the risk of operation and narcosis. A great collective is necessary to get representative results, considering the strong variation of dose values. A further clinical study of Angiography and Interventional Radiology is started to determine the exposure of the staff. At both conventional and digital over and undertable X-ray tube units the dose at the fingers will be measured by official ring-dosimeters. Additional TLDs will be used to determine the dose to head and neck. The third part is to investigate the suitability of storage phosphor radiography for mammography. Objective physical parameters like spatial resolution, signal-to-noise ratio or Wiener Spektrum will be correlated with the dose at the imaging system. Additionally a ROC-Analysis (Receiver Operating Characteristics Curve) compares digital...