Fig. 5.
Bone mineral density (BMD) extracted from different image reconstructions. (a) The mean and standard deviations of all 24 subjects (mg/cm3). (b) The scatter plot of the measurements from sparse sampling images versus the original dose image. (c) The scatter plot of the measurements from the reduced tube current versus the original dose. The original dose is along the x-axis. Ultra-low-dose measurements at 50%, 25% and 10% are along the y-axis. The regression line is drawn in colour. The grey line depicts the centre line