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. 2015 Jul 14;35(4):1056–1076. doi: 10.1148/rg.2015140232

Figure 12a.

Figure 12a

Atlas-based approach to lung segmentation. Atlas-based approaches often start with a template of the target organ (a). An image registration algorithm is then used to align the template to the target image such that the template can be transformed geometrically into the target image to identify lung tissues (b).