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. 2017 Jan 20;96(3):e5937. doi: 10.1097/MD.0000000000005937

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Copyright © 2017 the Author(s). Published by Wolters Kluwer Health, Inc.

This is an open access article distributed under the Creative Commons Attribution License 4.0 (CCBY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0

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Changes in basic statistics of xenon-enhanced CT and pulmonary function tests by treatment for COPD. Xenon CT and pulmonary function tests were performed before and after treatment with bronchodilators in three COPD patients. Cases 1 (diamond) and 3 (triangle) show increase in FEV₁, and the mode and volume of the histogram were shifted to the right after treatment. COPD = chronic obstructive pulmonary disease, CT = computed tomography, FEV₁ = forced expiratory volume in 1 second, xenon-enhanced CT = xenon-enhanced dual-energy computed tomography.