Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment of the frontal view is limited due to marked lordotic positioning . The patient is status post median sternotomy and CABG . Cardiac silhouette size appears mildly enlarged . Symmetric fullness of the superior mediastinum is due to enlargement of the thyroid , as seen on the previous CT . The hilar contours are unchanged . There is likely retrocardiac atelectasis . No focal consolidation , pleural effusion or pneumothorax is demonstrated . Multiple pulmonary metastatic nodules are again re - demonstrated , better assessed on the recent chest CT . There is no pulmonary vascular congestion . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Limited exam due to lordotic positioning . Probable retrocardiac atelectasis . Grossly unchanged bilateral pulmonary nodules compatible with metastatic disease , but better assessed on recent CT .