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AJNR - American Journal of Neuroradiology

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Selective Lumbar Nerve Root Blocks with CT Fluoroscopic Guidance: Technique, Results, Procedure Time, and Radiation Dose

Andrew L. Wagner^a

^a From the Department of Radiology, Rockingham Memorial Hospital, Harrisonburg, VA; and the Department of Radiology, University of Virginia School of Medicine, Charlottesville, VA

View larger version (41K): [in a new window]   FIG 1. Initial scout image shows the nerve root in the neural foramen, indicating an appropriate injection level. The distance tool is used to calculate an appropriate skin injection site. Once the technologists become familiar with the anatomy, many studies can be done with only one or two scout images.

View larger version (41K): [in a new window]   FIG 2. Image from CT fluoroscopy-guided nerve root block demonstrates the needle tip in the outer neural foramen. Note that the image is not as sharp as standard CT images due to the low mA used with this technique.

View larger version (41K): [in a new window]   FIG 3. S1 nerve root block shows the needle traversing the sacral foramen and lying directly adjacent to the S1 nerve.