Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Low lung volumes limits assessment . There is mild left basal atelectasis . Otherwise , the lungs appear clear without evidence of pneumonia or CHF . No large effusion or pneumothorax is seen . The cardiomediastinal silhouette is normal . No displaced rib fractures are seen . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild left basal atelectasis , otherwise normal . If there is strong clinical concern for rib fracture dedicated rib series may be obtained .