Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , accounting for some bronchovascular crowding . There are bilateral diffuse increased interstitial opacities . There is no pleural effusion . No pneumothorax is identified . Atherosclerotic calcifications of the aortic arch are present , and the aorta is unfolded . Mild enlargement of the heart size is likely due to low lung volumes . Degenerative changes are again seen within the thoracic spine .
    OUTPUT:
    
Findings compatible with mild pulmonary vascular congestion .