Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well - expanded and clear . The heart is mildly enlarged , and the mediastinum is unremarkable . There is no pleural effusion , pulmonary edema , pneumothorax , or focal airspace opacification .
    OUTPUT:
    
Mild cardiac enlargement . Otherwise , no acute cardiopulmonary process .