Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low which accentuates the size of the cardiac silhouette . Heart size is borderline enlarged . The aorta is slightly unfolded . The mediastinal and hilar contours are within normal limits , and there is no pulmonary vascular congestion . Streaky opacities are noted in the lung bases , possibly atelectasis though infection or aspiration can not be excluded . No pleural effusion or pneumothorax is visualized . There are no acute osseous abnormalities .
    OUTPUT:
    
Streaky bibasilar airspace opacities may reflect atelectasis though infection or aspiration are not excluded .