Fig. 4From: Prediction of osteoporosis and osteopenia by routine computed tomography of the lumbar spine in different regions of interestScatter plots showing the strongest correlations between the HU values of different ROI and BMD at the L1–L4 level (all r > 0.75, p < 0.01): a round ROI, b oval ROI, c left ROI, d front ROI, e right ROIBack to article page