Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . The lungs are clear aside from minimal left basal atelectasis . There is no pneumothorax or effusion . The heart and mediastinal contour is stable . No definite bony abnormality and no definite sign of a displaced rib fracture .
    OUTPUT:
    
Mild left basal atelectasis . Otherwise , unremarkable chest radiograph .