This paper describes the teleradiology application CHILI from the graphical user interface point of view. We present the most important design decisions taken during the construction of the system and discuss different methods and techniques that affected the design process. Some non-standard design principles are presented, and the reasons behind them. Several of the basic GUI constructions used in the CHILI application are somewhat similar to those seen in Sun’s HotJava Views™ [3]; the application lacks the traditional connection to the desktop metaphor and has instead a work task oriented approach. Keywords Design criteria, GUI, teleradiology, work task, patterns.