Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires are intact . Prosthetic aortic valve is present . Cardiomediastinal contours normal . There is no pleural effusion or pneumothorax . There is no focal lung consolidation . There is no pulmonary edema . There is no acute osseous abnormality .
    OUTPUT:
    
No evidence of pneumonia .