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Workflow of patient-specific geometry generation. We use (a) patient CT data to (b) segment the lung lobes and visible first airway generations. Based on this, we use (c) algorithms to generate the peripheral larger airway branches (Ismail et al. 2013; Roth et al. 2017; Tawhai et al. 2000) and from them, (d) the larger pulmonary blood vessels (Ismail et al. 2013; Ismail 2014). We perform a simulation using (e) the geometry of the left top lung lobe
