1. A tracking system, comprising: a medical device, the medical device including a distal portion adapted for insertion into a body of a patient and a proximal portion adapted to remain external to the body of the patient, the proximal portion of the medical device at least temporarily having a magnetic element attached thereto; a first medical imaging system configured to image a first body portion of the patient, the first medical imaging system configured to sense a magnetic field of the magnetic element in order to generate magnetic field strength data; a tracking circuit configured to track movement of the medical device relative to the first medical imaging system, the tracking circuit including: a processor configured to receive the magnetic field strength data and compute position data of the medical device, the position data of the medical device including three-dimensional data regarding a position of the distal portion of the medical device; and a memory for storing the position data; and a second medical imaging system configured to image a second body portion of the patient.