Fig. 2.

Representative segmentation and lung/lobe volume measurement in a 44-year-old male: axial (a), sagittal (b), and coronal (c) images, and volume rendering images (d) taken in the supine and standing positions. Yellow is the right upper lobe, blue is the right middle lobe, green is the right lower lobe, pink is the left upper lobe, and purple is the left lower lobe. The volumes of the total (bilateral) lungs in the supine vs. standing positions in this subject were 5,148.0 vs. 5,670.2 mL, respectively (10.1% increase); right lung, 2,738.8 vs. 2,972.3 mL (8.5% increase); right upper lobe, 959.4 vs. 1,024.6 mL (6.8% increase); right middle lobe, 514.1 vs. 537.2 mL (4.5% increase); right lower lobe, 1,265.3 vs. 1,410.6 mL (11.5% increase); left lung, 2,409.2 vs. 2,697.9 mL (12.0% increase); left upper lobe, 1,226.4 vs. 1,329.0 mL (8.4% increase); and left lower lobe, 1,182.8 vs. 1,368.9 mL (15.7% increase).