Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate the lungs are well expanded and clear . There is no evidence of pneumothorax , pulmonary edema , or pleural effusion . The cardiomediastinal silhouette is unremarkable . No focal opacities are seen .
    OUTPUT:
    
No acute cardiopulmonary process . No evidence of pneumothorax .