Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs . The lungs are clear . There is no pleural effusion or pneumothorax . The heart is mildly enlarged and has been slowly increasing in size when priors from ___ and ___ .
    OUTPUT:
    
No acute cardiopulmonary process . Heart size has been slowly increasing over the course of several years .