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. 2020 Dec 3;76(2):144–151. doi: 10.1136/thoraxjnl-2019-214375

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Left panel: Example of signal change through a parenchymal region of interest. The full width at half-maximum (FWHM) signal is often used as a standard threshold for integration. Right panel: CT with best matching coronal slice mean transit time (FWHM) maps derived from dynamic contrast-enhanced MRI from two participants (A+B and C+D). Reticulation and honeycombing on the CT is related to regions of increased transit time in basal and peripheral regions. Colour bar denotes FWHM in seconds.