Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires again noted , fragmented along the superior margin . The heart is mildly enlarged . Scattered calcified pleural plaque noted likely accounting for speckled opacities overlying both lungs . No convincing evidence for pneumonia or edema . No large effusion or pneumothorax is seen . The mediastinal contour is normal . Bony structures are intact . Cervical fusion hardware noted .
    OUTPUT:
    
Mild cardiomegaly . No convincing sign of pneumonia or edema .