Figure 3From: Quantification of 99mTc-DPD concentration in the lumbar spine with SPECT/CT Correlation plot between bone density and age. Bone density (HU) is on the vertical axis, and age (years) is on the horizontal axis. The dark red dashed curves depict the 95% confidence interval, the green dashed curves are the borders of the 95% prediction interval and the blue line shows the linear regression line fit.Back to article page