Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy with aortic corevalve device again noted in unchanged position . Cardiac silhouette remains unchanged , mildly enlarged . The aorta is tortuous and diffusely calcified . Mild to moderate pulmonary edema is somewhat worse compared to the previous exam . Small right pleural effusion is noted . Bibasilar atelectasis is demonstrated . No pneumothorax is identified . Multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Mild to moderate pulmonary edema , worse compared to the previous study , with small right pleural effusion .