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Table 2 Conditions for determining lobe membership

From: Automatic pulmonary fissure detection and lobe segmentation in CT chest images

Conditions Point location
F 3(x i ) > 0 Right upper lobe
F 2(x i ) > 0 F 3(x i ) < 0 Right intermediate lobe
F 2(x i ) < 0 F 3(x i ) < 0 Right lower lobe
F 1(x i ) > 0 Left lower lobe
F 1(x i ) < 0 Left upper lobe