Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . Comparison with ___ radiograph . Midline sternotomy wires are again noted . Calcified curvilinear structure along the base of the heart is again noted , likely reflecting an old infarction with no aneurysm formation . There is evidence of emphysema . No signs of pneumonia or CHF . No pleural effusion or pneumothorax . Bony structures are intact .
    OUTPUT:
    
No significant interval change , no acute findings .