Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . Sternotomy wires , prosthetic valve , and left chest wall pacer are stable . New bilateral lower lobe hazy opacities are nonspecific and may represent infection , aspiration , or hemorrhage . No pneumothorax or pneumoperitoneum is identified .
    OUTPUT:
    
New bilateral lower lobe hazy opacities are nonspecific and may represent aspiration or infection . No pneumoperitoneum .