Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . There is upper zone redistribution , without overt CHF . No focal infiltrate , effusion , or pneumothorax detected . Cervical fixation hardware is partially imaged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .