Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient 's chin partially obscures the medial lung apices . The patient is status post median sternotomy and aortic valve replacement . The heart is top normal in size . The cardiomediastinal silhouette and hilar contours are within normal limits . Subtle bibasilar opacities are most consistent with atelectasis . There is no evidence of focal consolidation . There is no large pleural effusion .
    OUTPUT:
    
No evidence of frank pulmonary edema . Bibasilar atelectasis .