Dicompass is a fast, multi-platform DICOM viewer based on DCM4CHE. It can import DICOM studies into its local database from the local file system, or from a PACS server. The viewer can save preset windowing levels and can produce MPR and MIP reconstructions. The program features a unique user interface, where pull-out menus are available on three sides of the window, one of which changes its content based upon the currently selected tool. The program makes efficient use of memory and CPU, so is capable of loading large data sets.