Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . There is mild pulmonary vascular congestion . Left base opacity with obscuration of the left hemidiaphragm is seen with may be due to atelectasis as well as dilatation of the descending aorta . Aortic arch is calcified . Cardiac silhouette is top - normal to mildly enlarged . No large pleural effusion is identified . Mid lung atelectasis is seen .
    OUTPUT:
    
Low lung volumes and mild pulmonary vascular congestion . Left base opacity with obscuration of the left hemidiaphragm may be due to atelectasis as well dilatation of the descending aorta . No large pleural effusion seen .