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 within normal limits . The mediastinal contours are unremarkable . There is crowding of the bronchovascular structures . Minimal patchy opacity in lung bases likely reflects atelectasis . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities . No overt pulmonary edema is seen .
    OUTPUT:
    
Low lung volumes limit assessment of the lung bases . Streaky opacities in the lung bases likely reflect atelectasis , though infection can not be excluded . No evidence of acute traumatic injury .