Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change . The lungs are clear . No focal consolidation , pneumothorax , pleural effusion , or pulmonary edema . Stable appearance of the cardiomediastinal silhouette , hila , and pleura . Stable top - normal heart size .
    OUTPUT:
    
No evidence of acute intrathoracic abnormality .