Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views the chest were provided . Mild left basal atelectasis . Lungs are otherwise clear . No signs of pneumonia or edema . No large effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
1 . Mild left basal atelectasis . Otherwise unremarkable . 2 . No definite displaced rib fracture though if there is continued concern dedicated rib series may be performed to further assess .