1. A tracking system for a medical device, the medical device including a distal portion for insertion into the body of a patient and a proximal portion remaining external to the patient body, the proximal portion of the medical device at least temporarily associated with a magnetic element, the system comprising: a tracking circuit to track movement of the medical device, the tracking circuit including: a processor that computes position data of the medical device according to detection of the magnetic element; and a memory for storing the position data; a first medical imaging system for imaging a first body portion of the patient, the first medical imaging system including an interface for communicating information relating to the position data of the medical device; and a second medical imaging system for imaging a second body portion of the patient.