Fig. 1From: Simplified S1 vertebral bone quality score independently predicts proximal junctional kyphosis after surgery for degenerative lumbar scoliosisA A typical standing full-length posteroanterior plain radiography of DLS clearly showed the structural lumbar curve (B, C). Sagittal non-contrast-enhanced T1-weighted MRI of the lumbar spine detailing the SI of the ROI (circles) used to calculate the S1 VBQ scoreBack to article page