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Fig. 1 Documentation of fluoroscopic injection. 70-year-old woman with
grade 2 degeneration of right L4-L5 facet joint. One needle (curved
arrow) is placed in right L3-L4 facet joint. Contrast material has not
yet been injected. Second needle (large straight arrow) is placed in
right L4-L5 right facet joint. Thin line of contrast material is visible
within joint space (small straight arrows) with filling of inferior
and superior joint recesses (arrowheads).