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. 2021 Aug 16;16:150. doi: 10.1186/s13014-021-01865-8

Fig. 3.

Fig. 3

Absolute difference for each identified gold fiducial marker (GFM) center of mass (CoM) between observers, displayed in anterior-posterior (A), left-right (B) and cranio-caudal (C) directions. On the x-axis, the absolute difference between observers in mm is shown for identification in CT images (dark gray) and MR images (white with black outline). On the y-axis the number of observations in each bin are shown. Bin width was 0.05 mm for all graphs. Bins with an overlap of the CT and MR are colored in light gray