Correct!
3. The chest radiograph shows interval worsening of the findings noted previously, now with worsening basal linear opacities and more poorly defined right mid-lung opacity

The frontal and lateral chest radiograph shows diminished lung volumes with clear interval worsening of basal predominant interstitial thickening and peribronchial infiltration, with new right mid-lung poorly defined opacity. No cystic or cavitary lesions are present, and there is no clear evidence of either hilar / peribronchial or mediastinal lymph node enlargement.

Clinical course: The patient subsequently underwent repeat thoracic CT (Figure 6).

Figure 6. Panels A-I: Thoracic CT in lung windows 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 interval worsening of pre-existing nodules and bibasilar peribronchial infiltration, ground-glass opacity, and bronchiectasis
   
2. The thoracic CT shows new peribronchial and mediastinal lymph node enlargement
   
3. The thoracic CT shows new pleural effusions
   
4. The thoracic CT shows new upper lobe bronchiectasis
   
5. The thoracic CT shows regression in the previously noted nodular opacities

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