AUTHOR=Li Frank , Zhang Xuan , Comellas Alejandro P. , Hoffman Eric A. , Graham Michael M. , Lin Ching-Long TITLE=Longitudinal study of COPD phenotypes using integrated SPECT and qCT imaging JOURNAL=Frontiers in Physiology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2025.1555230 DOI=10.3389/fphys.2025.1555230 ISSN=1664-042X