REDUCING SUSCEPTIBILITY ARTIFACTS IN MRI USING COMPOSITE MATERIALS

摘要

A susceptibility-matching composite material (200) composed of a highly diamagnetic material and a filler material reduces susceptibility artifacts in MRI. The composite, for example, may be formed by embedding highly diamagnetic particles (e.g., graphite powder) in a lightweight filler material (e.g., stryofoam or expanded polystyrene foam or EVA foam) such that the net susceptibility of the composite (200) matches human tissue (206) or other test substance to be imaged. The filler is preferably a non-conductive, low-density material that is either deformable or formed as a deformable collection of small beads packaged in a container so that the composite (200) conforms to the surface of a body (206) pressed against it.