Fig. 1

Illustration of Artificial Intelligence-Assisted CT imaging. Figures A to C were chest CT images of an unvaccinated patient during hospitalization. Chest CT of this patient was normal at admission, and on the third day of hospitalization showed traces of patchy ground-glass opacities on both lungs (A). A repeated chest CT on the 7th of hospitalization demonstrated substantial lesion progression. The most severe lung lesions were demonstrated by the chest CT scan obtained on the 11th day of hospitalization, with large patches of ground-glass opacities on both lungs (B). Follow-up chest CT scans performed on the 15th and 22nd day of hospitalization showed gradually improvement of the lung lesions. The last chest CT was completed on the 29th day of hospitalization, revealing a substantially resolution of lung lesions (C). Figures D–F demonstrated inflammatory areas on three CT scan images that were automatically demarcated by artificial intelligence (AI) software. The lung lesions demarcated by AI software were consistent with those delimited by visual inspection. The extent of lung injuries was presented as VOI and POI in the whole lung. For the three sequential chest CT scans of the patients, VOI (POI)in the whole lung was 47.1 cm³(1.3%); 523.6 cm³ (13.3%); 242.6 cm³ (6.2%), respectively.