Fig. 1. The location of puncture site. (A) The inferior and superior endplate of the T11-12 intervertebral disc kept in a line (red line) in the anteroposterior view. The 3 black lines were Kirschner wires for preliminary positioning assistance. (B) The X-ray tube ball was then rotated to an oblique position ipsilateral, made the tip of the superiorarticular process of T12 point to the midpoint of the T11 vertebral body in the oblique view. The intersection of the 2 red lines was the puncture point on the skin.
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