Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . This accentuates the size of the cardiac silhouette which is likely mildly enlarged . Aorta is tortuous . There is crowding of the bronchovascular structures , and mild pulmonary vascular congestion is likely present , but no overt pulmonary edema is seen . There may be a trace left pleural effusion . Patchy opacities in the lung bases , more so on the right , likely reflect atelectasis though aspiration can not be completely excluded . No pneumothorax is identified . There is no acute osseous abnormality .
    OUTPUT:
    
Low lung volumes . Patchy opacities at the lung bases likely reflect atelectasis . Probable small left pleural effusion and mild pulmonary vascular engorgement .