Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are improved compared the prior study . The trachea is central . The cardiomediastinal contour is unchanged . The heart is not grossly enlarged . No pleural effusion , consolidation or pneumothorax seen . The visualized bony structures are unremarkable in appearance .
    OUTPUT:
    
No acute cardiopulmonary process seen .