Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . This accentuates the size of the cardiac silhouette which is likely mildly enlarged . The aorta is tortuous . There is mild pulmonary vascular congestion . Streaky opacities at the lung bases may reflect atelectasis , though infection can not be completely excluded . No large pleural effusion or pneumothorax is identified . There is no acute osseous abnormality .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis , though infection at the lung bases is not completely excluded . Mild pulmonary vascular congestion .