Dr. Talekar is an Assistant Professor of Radiology in the Division
of Neuroradiology; Dr. Cox is a Resident in Radiology; Dr. Smith is a
Neuroradiology Fellow; and Dr. Flanders is a Professor of Radiology in
the Division of Neuroradiology/ENT, Thomas Jefferson University
Hospital, Philadelphia, PA. Dr. Talekar presented the contents of this
article at the annual symposium of The American Society of Spine
Radiology in February 2015.