Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear and lung volumes are normal . No pleural effusion , pneumothorax or focal airspace consolidation worrisome for pneumonia . Heart is normal size . Aorta is tortuous , unchanged . Hilar contours are unremarkable . Sternotomy wires are present . No radiopaque prosthetic valves noted .
    OUTPUT:
    
No radiopaque prosthetic valves .