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Fig 1. Comparison of BSCTA with rigid registration BSCTA, SB-BSCTA, and PR-BSCTA: CTA (MIP) shows a patient with high-grade stenosis of left ICA. Rigid registration leads to insufficient removal of the lower cervical spine (A, Lateral. B, Frontal projection). The edges of the individual registration slabs from SB-BSCTA (C and D) can be identified by the bone remnants from the mandible and cervical spine (arrows). Weighting of total bone mass within each slab is performed in this algorithm, explaining the distribution of the bone remnants. PR-BSCTA (E and F) demonstrates almost complete elimination of the bone pixels from the mandible and cervical spine. The thyroid cartilage remains misregistered with both approaches.
