Electromagnetic device tracking system spatial marker, non-powered
Definition
A non-powered, noninvasive device intended to provide a fixed reference point for the electromagnetic (EM) tracking of a patient and/or instruments during a surgically-invasive procedure, whereby tracking images are overlaid on pre-acquired and/or real-time images [e.g., computed tomography (CT), magnetic resonance imaging (MRI), ultrasound (US)]. Also referred to as a navigation fiducial marker or tracker, 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.