[The method of computer-assisted orthopedic surgery based on two-dimensional fluoroscopy: the principles of action].

Surgical instruments play a major role in orthopedic surgery; usually they are controlled visually at the operation. In certain situations additional device to control instrument is needed. The aim of this paper is to present theoretical foundations, create prototype and give initial assessment of computer assisted orthopedic surgery system. Two-dimensional fluoroscopy was the base for system functioning. Lab tests and first applications in the operating room are presented. Precision of the system found allows for its use in orthopedic surgery with television monitoring.