1. A computer-automated image visualization method for displaying images from an image data set comprising a plurality of image elements, each image element having an associated image value, the method comprising: a) providing a visualization application with a library of presets, each preset defining a mapping between image values and their representation in a graphical user interface; b) loading an image data set from a data file containing the image data set; c) displaying an initial representation of the loaded image data set on a graphical user interface; d) receiving user input from a location in the representation to indicate a region of interest in the image data set; e) determining properties of image elements in the region of interest; f) making a list of potentially suitable presets from the library of presets based on the determined properties of the region of interest; and g) presenting the potentially suitable presets to the user for selection; wherein the image data set is a volume data set having voxels as its image elements, each voxel has an associated voxel value as its associated image value, and the property of voxels used for the determination comprises statistical fluctuation in voxel value in said group of voxels.