• T B Hughes, J D Richman, and W E Rothfus.
• Department of Orthopaedics, Allegheny University of Health Sciences, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA.
• Spine. 1999 Apr 1; 24 (7): 715-8.

Study DesignA case of os odontoideum diagnosed using kinematic magnetic resonance imaging is presented.ObjectivesTo evaluate the kinematic magnetic resonance imaging findings of os odontoideum and the possible use these findings might have to guide treatment.BackgroundKinematic magnetic resonance imaging is a new imaging modality that is able to produce realtime images of a structure through a range of motion. This makes it well suited for investigating dynamic processes such as cervical instability.MethodsA single subject with known os odontoideum was examined using a Sigma SPR Kinematic Magnetic Resonance Imager (General Electric, Florence, SC).ResultsKinematic magnetic resonance imaging demonstrated cervical spinal cord impingement and cervical instability throughout flexion and extension, but not during lateral bending or rotation.ConclusionsKinematic magnetic resonance imaging can evaluate the cervical spine in an axially loaded position throughout its range of motion. This modality may be a useful method for diagnosing and classifying abnormalities of the spine.

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