Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal radiograph of the chest demonstrates perhaps borderline enlarged heart size , although it is difficult to assess on this portable study . There is no pulmonary vascular congestion , pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
No pulmonary edema or pneumonia . Possible borderline enlarged heart size .