1. A motion tracking system for an object in a magnetic resonance imaging scanner, the system comprising: an object orientation marker configured to be coupled to the object; at least two detectors configured to periodically image the object orientation marker, the at least two detectors each configured to view the object orientation marker along a different line of sight; and a tracking system configured to analyze images generated by the at least two detectors 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.