Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal airspace opacity , significant pleural effusion , or pneumothorax on this supine view . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits . The trachea is midline . No displaced rib fractures are detected . There is no acute osseous abnormality identified . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .