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. 2014 Jun 19;16(1):43. doi: 10.1186/1532-429X-16-43

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Copyright © 2014 Groarke et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Image segmentation scoring: A- Grade 1: poor segmentation due to inability to separate LA and PVs from adjacent structures; B- Grade 2: moderate segmentation with incomplete separation of LA and PVs from adjacent structures; C- Grade 3: good segmentation with near complete separation of LA and PVs; D- excellent segmentation with complete separation of LA and PV.