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. 2014 Feb 28;9(2):e90040. doi: 10.1371/journal.pone.0090040

Figure 1. Comparison of the lung volume at expiration with the level of FRC.

Figure 1

Comparison of the lung volume at expiration, which was calculated by CT data, with the level of FRC, which was measured by the helium closed circuit method. The lung volumes measured by the two methods are well-correlated (R = 0.83, p<0.001). LV exp: lung volume at expiration.