T11, T12 medial branch block in patient with L1 compression fracture (vertebroplasty state). The T12-L1 joint is the medial branch of the T11 and T12 dorsal ramus. Anteroposterior radiography of contrast medium injected onto the target point for T11 and T12 medial branch blocks. The needle tip point to the contrast medium at the site for T11 and T12 medial branch blocks on the T12 and L1 superior articular processes. P, pedicle.