Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta is unfolded . Atherosclerotic calcifications are noted at the aortic arch . Pulmonary vasculature is normal . Lungs are hyperinflated without focal consolidation . Minimal atelectasis is noted in the lung bases . Focal rounded opacity within the right upper lobe measuring approximately 9 mm corresponds to an area of ground - glass opacification on the previous PET - CT and appears unchanged . No pleural effusion or pneumothorax is present . Pulmonary vasculature is not engorged . Paraseptal emphysema is again noted at the lung apices . There is no acute osseous abnormality . Degenerative changes are again demonstrated in the thoracic spine .
    OUTPUT:
    
Atelectasis in the lung bases without focal consolidation . Unchanged focal rounded opacity in the right upper lobe which corresponds to an area of nonspecific ground - glass opacification on the previous PET - CT .