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Fig. 1B —67-year-old man with sciatica. Posteroanterior (A) and
lateral (B) spot radiographs obtained during intraepineural injection
of transforaminal epidural steroid. Patient was placed in prone position, and
needle tip was inserted to left S1 nerve root. Contrast material is well
demarcated from outer border, a feathery appearance is apparent in central
region, and width of area of opacification is uniform.
