Fig. 1
a–d. XR anteroposterior (a) and lateral (b) Dynamic acquisition in max extension (c) and max flexion (d). Positioning of double interspinous device at L4-L5 e L5-S1 (little radio-opacity of the device is appreciable). Slight left lumbar scoliosis. Slight anterior listhesis L5–S1 not changing in dynamic acquisition
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