Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate well expanded lungs . There is slight increase in markings at the bilateral lung bases , unchanged from the prior exams . There is stable relative elevation of the left hemidiaphragm . The heart is top normal in size . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax , pleural effusion , or focal consolidation .
    OUTPUT:
    
No acute cardiopulmonary process . The heart is top normal in size .