Reliability of 3D image analysis and influence of contrast medium administration on measurement of Hounsfield unit values of the proximal femur
Fig 3
Bland–Altman plots of inter-rater agreement.
Bland–Altman plots of measures of the total volume (A), the HUHAfat (B), the HUHAdense-bone (C), and the mean HU (D) show the relationships among measurements made by the two observers. Differences (y-axis) between duplicate measurements are plotted against the mean values (x-axis) of those measurements. Solid blue lines indicate mean differences. The top and bottom dashed lines correspond to the upper and lower margins of the 95% limits of agreement. At a probability of 95%, differences in normalized scores lie between the upper and lower limits of agreement (mean ± variability estimate = 1.96 standard deviations [SDs]).