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STH estimation algorithm. The algorithm uses an intuitive approach to determine image orientation, by comparing the relative position of bone and crown, with respect to their COMs. Then H1 and H2 are assigned to the most coronal soft tissue and bone segmentation mask, respectively. Finally, STH is defined as the Euclidean distance between H1 and H2, i.e., their L2 norm, ||||2. COM, center of mass; STH, soft-tissue height.
