Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post left lower lobectomy . Increased density along the left lung base and increased retrocardiac opacity is likely related to post-surgical changes . The right lung is clear . Evaluation of the cardiac silhouette is limited by overlying post - surgical changes .
    OUTPUT:
    
Increased retrocardiac and left lung base opacities , likely related to post-surgical changes . Right lung is clear .