Most of the digital medical devices used in modern clinics and practice provide data corresponding to the DICOM Standard [2]. Cyclops [1], a knowledge-based image analysis system developed at the University of Kaiserslautern, was suitable to analyze such images, but we needed a DICOM interface to connect to DICOM databases easily and transfer data to the system. All non-commercial software available were not be up to our demands, so we implemented a DICOM Network Client by our own, which can connect to the ctn image server [3], basing on a SQL database. We attached great value to a neat, object{oriented implementation, because it is easy to expand and we are exible to future versions of the DICOM Standard.