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Boxplot of spread of Euclidean distances, for all even respiratory phases, between pairs of anatomical landmarks that were delineated in both 4D-T1w and 4D-T2w MRI. All Euclidean distances agreed to less than 7.6 mm (Euclidean distance of two voxels) and 355 out of 470 pairs of anatomical landmarks were consistent to less than 3.8 mm (Euclidean distance of one voxel).
