Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . The mediastinal contours are normal . The heart size is slightly increased from prior exam , but remains at the upper limits of normal .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Slight interval increase in the cardiac size , which is now at the upper limits of normal .