Fig. 2
A Ki and B VT of two-tissue-compartmental modelling and tissue-to-plasma ratios at C 60–65 min and D 6–7 h timepoints of pelvic bone marrow show higher values in COVID-19-recovered patients compared to the controls and are the highest in Subject 2, twice infected with the virus. The 4-month follow-up scans in COVID-19 patients show increased Ki, VT and tissue-to-plasma ratios compared to the initial scans. The measurements in vaccinated and unvaccinated controls were similar.