Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear with post-surgical changes and chain suture noted in the right mid lung . The lungs are obscured in part due to dense irregular calcified pleural plaques as seen on previous CT from ___ . Previously described interstitial edema has resolved . There is no pleural effusion or pneumothorax . Median sternotomy wires and changes from prior mitral valve replacement are noted . The heart is normal in size . Normal cardiomediastinal silhouette .
    OUTPUT:
    
No acute intrathoracic process .