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. 2020 Jun 22;20:434. doi: 10.1186/s12879-020-05154-9

Fig. 5.

Fig. 5

Typical CT signs. Halo sign a: Moderate type patient. CT showed a pGGO with halo sign in the left low lobe (arrow). reversed halo sign b: Moderate type patient. CT showed a mGGO with reversed halo sign (arrow). Crazy paving sign c: Moderate type patient. CT showed two pGGOs with crazy paving sign in the left low lobe (arrow). Cavity sign d: Moderate type patient. CT showed a pGGO with a small cavity (arrow)