Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . Streaky , bibasilar airspace opacities are noted , which likely represent atelectasis . The left costophrenic angle is somewhat blunted , which may reflect a small pleural effusion versus chronic scarring . The descending thoracic aorta is unfolded . The cardiomediastinal silhouette is otherwise grossly within normal limits and without evidence of pneumomediastinum . No pneumoperitoneum .
    OUTPUT:
    
Low lung volumes and streaky bibasilar opacities likely reflecting atelectasis , with aspiration felt to be less likely . No convincing evidence for pneumomediastinum .