This paper describes the porting of a teleradiology system to a Personal Digital Assistant (PDA). The basis for this formed the CHILI teleradiology and PACS system developed by the Steinbeis Transferzentrum Medizinische Informatik, Heidelberg (STZ) in cooperation with the German Cancer Research Center. The work was done as part of a EU IST project called Multimedia Terminal Mobile (MTM). The authors collected user requirements in a first step. Appropriate hardware has been selected based on these requirements. Dedicated software versions of CHILI have been realized on selected PDA hardware. The prototypes have been constantly evaluated in cooperation with medical end-users. Technologies from project partners like speech communication and speech recognition have been integrated.