title: Introduction to the EJR Special issue on functional lung imaging.
authors.affiliation: Department of Radiology, UW-Madison School of Medicine and Public Health, Madison, WI, USA. Electronic address: mschiebler@uwhealth.org.
authors.forename: Mark L
authors.initials: ML
authors.lastname: Schiebler
authors.affiliation: Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan; Advanced Biomedical Imaging Research Center, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Ohno