Electromagnetic device tracking system fiducial marker
Definition
A non-sterile device intended to be used with an electromagnetic device tracking system to provide a physician with an external fixed reference point on the patient's body for the electromagnetic (EM) tracking of instruments inside the patient using pre-acquired images [e.g., computed tomography (CT) or magnetic resonance imaging (MRI)], or real-time image data and to join the imported CT and MRI images with real-time ultrasound (US). It typically consists of a radiopaque bracket-like device with an adhesive backing that is placed on the patient and allows the connection of an EM sensor for active registration. This is a single-use device.