AN ACTIVE TRACKING SYSTEM AND METHOD FOR MRI

摘要

A composite system for use in conjunction with an MR-imaging procedure. One composite system includes a fully-metallic filament, such as a needle or guide-wire, equipped with flat MR RF-receiver microcoil disposed such that a normal to the coil's plane is substantially transverse to the filament's axis. The microcoil is electrically connected to external device to register change of position and orientation of the tip during the navigation of the filament. Alternative composite system includes a filament made from different materials. The very tip includes diamagnetic and non-metallic tube tightly fit around geometrically-modified portion of the main body and carries at least one microcoil electrically connected to external device to register change of position and orientation of the tip during the filament navigation. Data representing co-registration of the position and/or orientation of filament is fed back to the system to improve navigation accuracy and precision.