1. A motion tracking system for an object in an magnetic resonance imaging scanner, the system comprising: an object orientation marker configured to be coupled to the object; a magnetic resonance imaging scanner configured to scan the object; a detector configured to periodically image the object orientation marker, the detector configured to be positioned within the magnetic resonance imaging scanner; and a tracking system configured to analyze images generated by the detector to determine changes in position of the object orientation marker, and to generate tracking data for use by the magnetic resonance imaging scanner to dynamically adjust scans to compensate for the changes in position of the object orientation marker; wherein the tracking system comprises a computer processor and an electronic memory.