Figure 4.

Voxel classification errors for each patient and segmentation method. The percentage of misclassified voxels in the estimated DUTE (left bar) and Atlas-T1w-DUTE (right bar) μ-maps are shown for each patient and each type of error: Water as Bone, Bone as Water, Bone as Air, Air as Bone, Water as Air, and Air as Water (here “Water” refers to “soft tissue”). The Atlas-T1w-DUTE method shows the lowest total percentage of misclassified voxels in all subjects. In addition, the Atlas-T1w-DUTE method shows reduction in bone/air and air/bone errors in all subjects relative to the DUTE results. This is particularly important given the large difference in LAC values between these classes.