Abstract: 3D imaging offers the opportunity to gather new kinds of information for diagnosis and therapy. In order to access this information efficiently we need a model for the integration of knowledge which is extracted from the images. In this paper we present such a model for the description of image information as well as results of image analysis and manipulation. The purpose of the model is its use in computer assisted treatment planning. Therefore, we introduce a volume representation based on discrete 3D space to map the model on the computer. We call this representation an extended cell enumeration (XCE) representation. It is an extension of the well-known cell enumeration (CE) representation where graph structures are added to represent high-level knowledge together with the cell information. We show how to transfer information into this representation and how to access the represented information. We give examples of applications in the planning of stereotaxy and plastic surgery. !
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