Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mildly kyphotic positioning slightly limits assessment . The patient is status post median sternotomy . There is moderate enlargement of cardiac silhouette which is unchanged . The aorta is tortuous , similar compared to the previous study . No pulmonary edema is seen . Linear opacities within the lung bases are compatible with subsegmental atelectasis . No pleural effusion or pneumothorax is demonstrated . Multiple clips are seen projecting over the right axilla . Remote right - sided rib fractures are re - demonstrated .
    OUTPUT:
    
Bibasilar subsegmental atelectasis .