1. A medical instrument identification system for identifying a medical instrument from a plurality of medical instruments, comprising: a base part including a plurality of trackable markers attached thereto; at least one functional part configured for attachment to the base part, the at least one functional part including at least one unique identification feature different from the trackable markers; at least one optical sensor configured to detect the at least one identification feature of the at least one functional part when attached to the base part; and a data processing device operatively coupled to said at least one optical sensor, said data processing device operative to use videometric pattern recognition to identify the at least one functional part based on the detected identification feature, wherein the optical sensor and the data processing device are assigned to a medical instrument tracking system.