Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . Lungs are well - expanded without new focal consolidation concerning for pneumonia . Nodular opacities at the lung bases bilaterally is again noted , and may be slightly increased compared to the prior exam . There is no pneumoperitoneum .
    OUTPUT:
    
1 . No pneumoperitoneum . 2 . Slightly increased nodularity at the lung bases , which may reflect a superimposed acute infection .