Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . No focal consolidation , effusion , edema , or pneumothorax . The cardiomediastinal silhouette is within normal limits . Hilar contours are normal . No evidence of a replaced cardiac valve .
    OUTPUT:
    
No cardiomegaly or radiographic evidence of a replaced cardiac valve .