Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable cardiomediastinal contour with tortuosity of the thoracic aorta . Elevation of the right hemidiaphragm slightly increased from prior . Linear opacities at both lung bases likely reflect atelectasis . No large pleural effusion or pneumothorax . No displaced rib fracture .
    OUTPUT:
    
Elevated left hemidiaphragm with bibasilar atelectasis . No evidence of pneumothorax or displaced rib fracture .