Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no evidence of focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits . Healed fracture deformity , left seventh rib is chronic .
    OUTPUT:
    
1 . Clear lungs . 2 . Although no acute fracture or other chest wall lesion is seen , conventional chest radiographs are not sufficient for detection or characterization of such abnormalities . If the demonstration of such a chest cage abnormality is clinically warranted , the location of any referrable focal findings should be clearly marked and imaged with either bone detail views or CT scanning .