Correct!
5. The chest radiograph shows no significant change from prior

The hilar and mediastinal contours remain normal and no new areas of pulmonary consolidation are seen. No features to suggest increased pressure (hydrostatic) edema, such as interlobular septal thickening, central perihilar haziness, or pleural effusions. No evidence of cystic or cavitary lung disease is present. The chest radiograph appears relatively unchanged compared with the presentation imaging (Figure 1).

Clinical course: The patient subsequently underwent unenhanced thoracic CT (Figure 3).

Figure 3. Panels A-I: Static images in lung windows from thoracic CT shows multiple abnormalities (arrows). Lower panel: Movie of thoracic CT in lung windows.

Which of the following statements regarding this imaging study is most accurate? (Click on the correct answer to proceed to the next panel)

1. The thoracic CT shows diffuse centrilobular nodules
   
2. The thoracic CT shows miliary nodules
   
3. The thoracic CT shows multiple non-specific small nodular opacities and basal peribronchial infiltration and bronchiectasis
   
4. The thoracic CT shows numerous thin-walled cystic lesions
   
5. The thoracic CT shows upper lobe predominant fibrotic changes

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