Fig. 1.

Illustration of data acquisition of the study.

Fig. 1A illustrates MRI procedures. Fig. 1B illustrates PET procedures. The PET ¹⁵O session is further illustrated in 1C. The overall timeline of the experiment for each subject is illustraed in 1D. Timing of PET acquisition is illustrated in 1E. Arrows in 1E indicate bolus administrations of radiotracers, either through inhalation or intravenous injection.