Fig. 25.

a Pan et al. [2] showing COVID severity more in the lower lung regions, b Wang et al. [16] similarly showing the severity of infection in lower lobes of lungs, c Tian et al. [5] chest CT also shows the point of infection near the lower part of the left lung, d Elasnaoui & Chawki [78] showing normal lung X-Ray, e Elasnaoui & Chawki [78] showing COVID lung X-Ray, f Aigner et al. [7] showing COVID CXR, g image showing the anatomy of lungs, h original grayscale image from this study’s dataset with a white arrow pointing severity of infection at the bottom part of the right lung, i Block imaging showing most severity of infection in the right lower lobe of lung in RED color