Fig. 3

The comparison between the two CT examinations of the patient. A–C are the initial chest CT on July 31, 2021, showing patchy high-density shadows in the lingual segment of the left upper lobe, and multiple nodules in both lungs, as shown by the yellow arrow in A and the red arrow in C. D–F is a follow-up CT with the same slice as the previous images. Compared with A, D shows small cavity in the left pulmonary nodule, as shown in the enlarged G. Compared with B, E shows a new nodule in the right pulmonary lung as the blue arrow. The enlargement image in H shows a small cavity in the center. Compared with C, F shows the patchy high density has disappeared in the left lung and a small cavity appears in the nodule of the right lower lobe. The enlargement image in I shows a small cavity in the center