Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Calcified hilar nodes are better assessed on CT . The cardiac silhouette remains mildly enlarged . The aorta is somewhat tortuous . The lungs are hyperinflated , flattening of the diaphragms and increased AP diameter , consistent with chronic obstructive pulmonary disease . Slight increase in interstitial opacities diffusely bilaterally may relate to chronic lung disease . Atypical infection is less likely . There may also be a component of minimal interstitial edema . There is no focal consolidation . No large pleural effusion is seen , although very trace pleural effusion would be difficult to exclude . There is minimal biapical pleural thickening . No evidence of pneumothorax .
    OUTPUT:
    
Mild cardiomegaly . Hyperinflated lungs with mild diffuse increase in interstitial markings may relate to chronic lung disease . However , atypical infection is less likely .