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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2015 Mar 25;92(2):423–429. doi: 10.1016/j.ijrobp.2015.01.019

Figure 1.

Figure 1

A representative example of a patient with poor lung function. The ventilation defects in the 4DCT-ventilation image, 4DCT-ventilation derived metrics (using the HU method), and PFT data all indicate poor lung function for the presented patient.