Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes somewhat low but unchanged compared to the prior study . The trachea is central . The cardiomediastinal contour is within normal limits . No consolidation , pneumothorax or pleural effusion seen . The visualized bony structures are unremarkable in appearance .
    OUTPUT:
    
No acute cardiopulmonary process seen .