Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post CABG and mitral valve replacement . The heart is normal in size . The mediastinal and hilar contours are unremarkable . There is no pneumothorax or large pleural effusion . Chain suture material seen projecting over the right midlung medially . Nonspecific interstitial prominence is seen , particularly in the left lower lung . Atelectasis is also seen in the left lower lobe . There is no focal consolidation concerning for pneumonia . The overall appearance is unchanged since the reference radiograph from ___ .
    OUTPUT:
    
No pulmonary edema or effusion .