A system and method for magnetic resonance imaging and static field shimming. The adult harness has an adjustable adult belt with cooperating interlocking closure members to secure the belt around the waist of an adult and adjustable shoulder straps secured to the belt. The guide comprises a body for providing protected access to prepare across the spinal disc and into the adjacent vertebrae the implantation space. In one aspect, a single source that provides multiple species of plasma particles is advantageously used instead of having to switch or move in multiple sources. In one embodiment, an electromagnetic induction type thin film magnetic head, a magnetoresistance effect type thin film magnetic head, a first protective film, a heat dispersion layer with thermal conductivity higher than the first protective film, and a second protective film are formed in succession on a substrate.