Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Lower lung volumes are seen on the current exam and there is elevation of the right hemidiaphragm . Known posterior right 11th rib fracture is not seen on these plain films . There is no pneumothorax . Right basilar opacity suggestive of atelectasis . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Known posterior right 11th rib fracture not identified . No pneumothorax . No definite acute cardiopulmonary process .