Figure 5.

The initial and follow-up CT images of a 20 years old male patient in group 1. A: On initial CT images, multiple and small patchy GGO were observed in the parabronchial area. B: After treatment, the scale and density of opacities had decreased for a period. C: The lesions deteriorated again after that, manifested as more obvious and diffuse GGO with larger scale and higher density. Images in different lines represent different cross sections. CT = computed tomography; GGO = ground-glass opacities.