Figure 1.
Using coronal view as the orientation source and plotting landmarks on the sagittal view.
a) Left Porion. b) Right Porion. c) Left Orbitale.
Figure 2.
Plotted landmarks on 3D rendered images with MPR view.
Figure 3.
Images were viewed using multi planar reconstruction (MPR) with coronal view as the center of orientation.
a) Horizontal and vertical lines were adjusted until the standard trans-porionic axis was observed. b) Balance between axial, coronal and sagittal axis adjusted to connect trans-porionic axis (purple) with Orbitale through a coronal axis (blue). c) Axial view through FH after connecting the 3 axes.
Table 1.
Intra-Examiner Reproducibility – Mean Difference, Coefficients of Variability, and Intra-class Correlation statistics.
Table 2.
Intra- and Inter-reader Reliability – Reader Differences in Distances for Points Defining FH Plane.
Table 3.
Intra- Examiner Reproducibility and Inter-Examiner Reliability – Reader Differences in Dihedral Angle of FH Plane.
Figure 4.
Bland-Altman Plot for Examiner 1 vs. Examiner 5.
a) In x coordinate of right Porion. The horizontal lines represent the mean within-pair difference (−0.32 for examiner 5– examiner 1), the mean ±1.96 standard deviations (1 SD = 1.70), and the mean ±1.96 SD ± square root (3*SD2/n) for 95% CIs of limits of mean ±1.96 standard deviations. b) In y coordinate of right Porion.
Table 4.
Inter-Examiner Reliability – Mean differences, Coefficients of Variability (CV) and Intra-class Correlation statistics.
Figure 5.
Bland-Altman Plot for Examiner 1 vs. Examiner 5.
a) in x coordinate of left Orbitale (the shown digit preference reflects the slice thickness of 1 mm) b) In y coordinate of left Orbitale.
Figure 6.
Axial head view, A. FH plane estimated prior scan on subjects head B. FH plane identified by landmarks on Images.
(Note the differences in the muscles cross sectional area between both views).