Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is some atelectasis in the left lower lobe but the lungs are elsewhere clear . The cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . No displaced rib fractures are appreciated .
    OUTPUT:
    
No evidence of rib fracture or pneumothorax . Left lower lobe atelectasis . If clinical concern for rib fracture persists , suggest dedicated rib series .