Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , hyperaeration , pleural effusion , pneumothorax , or pulmonary edema . The left hilum is mildly prominent , but unchanged dating back to ___ . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .