Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear stable . The aortic arch is calcified . There is no definite pleural effusion or pneumothorax . Streaky opacity in the right costophrenic angle suggests minor atelectasis , which has decreased . There is similar mild spinal curvature .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .