Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal radiograph of the chest demonstrates the lungs are well expanded , with no evidence of focal pneumonia , pulmonary edema , pleural effusion , or pneumothorax . Minimal biapical scarring is again noted . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .