This image shows the lungs of a patient who smokes and has very early signs of emphysema.

The upper image is a colorized CT scan showing different airways in the lung of a monitor lizard. The bottom image shows how air flows in a mostly one-way loop through the lizard's lung ...

More information: Motohiko Yamazaki et al, 18F-FDG-PET/CT Uptake by Noncancerous Lung as a Predictor of Interstitial Lung Disease Induced by Immune Checkpoint Inhibitors, Academic Radiology (2024 ...