Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

Radiculopathy: CT intervention

Another axial CT obtained after insertion of the needle confirms correct position of the needle tip just next to the right L4 neuroforamen (straight arrow). The needle entered the skin exactly at the intended location (dashed arrow). This is facilitated by a focus of red light pointing at the planned puncture site on the patient’s skin that also provides angle information. (Contributed by Kristine Ann Blackham MD.)