. Author manuscript; available in PMC: 2020 Mar 10.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2018 Oct 26;103(3):738–746. doi: 10.1016/j.ijrobp.2018.10.024

Table 2.

Four-dimensional computed tomography–ventilation heterogeneity metrics for the esophageal and lung cancer patient cohorts

Ventilation metrics	Esophageal cancer cohort Mean ± SD	Lung cancer cohort Mean ± SD	P value
CoV	0.52 ± 0.20	0.55 ± 0.21	.54
Vent-RL (%)	11.2 ± 12.5	17.5 ± 20.5	.08
Vent-SI (%)	72.5 ± 14.6	69.1 ± 12.9	.18

Abbreviations: CoV = coefficient of variation; Vent-RL = right-to-left lung ventilation ratio; Vent-SI = superior-inferior ventilation.