Classification determines how volume data is displayed in 2D and 3D. During classification, an opacity value (3D) or a brightness value (2D) and a colour is assigned to each voxel, depending on it's 'grey value'. Classification can be done in an interactive dialog.

Segmentation divides volume data into different sections. The various segments are also called 'Regions of Interest'. A range of tools is available for segmentation; they are either grey-value based (e.g. region growing) or based on the geometry.

Once a ROI has been defined, analyses can be restricted to this area. In addition, ROIs can be used for the precise alignment of data sets.

Specific areas of a volume data set can be extracted as separate objects and exported into a new volume data set. The extracted area can be defined by a grey value interval or a Region of Interest.