Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and mitral valve replacement . Heart size remains mildly enlarged , but decreased compared to the previous study . The aorta is mildly tortuous and diffusely calcified . Pulmonary vasculature is not engorged . Hilar contours are normal . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality .