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. 2015 Nov 23;10(11):e0143327. doi: 10.1371/journal.pone.0143327

Fig 4. Initial estimation of the VB centers on one test CT image.

Fig 4

The estimation is done in a coarse resolution. The response volume of L3, L4, and L5 are visualized in each row, with 3 randomly selected 2D sagittal slices. The diffused probability distribution is observed in the response volumes due to the repetitive pattern of the VBs.