Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Resolving , now small left pleural effusion . Small right pleural effusion . Bibasilar atelectasis , greater on the right compared to the left . No focal consolidation to suggest pneumonia . No pulmonary edema or pneumothorax . The heart size is normal . Mediastinal contours are unchanged . Median sternotomy wires as well as the replaced aortic and mitral valves appear intact and unchanged in position .
    OUTPUT:
    
Resolving small left pleural effusion and a small right pleural effusion with adjacent atelectasis since ___ .