Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . Patchy opacity in the right lower lung is non-specific , but aspiration , pneumonia or substantial atelectasis could be considered .
    OUTPUT:
    
Patchy medial right lower lung opacity worrisome for pneumonia , and in the appropriate setting , aspiration or atelectasis could be considered . Short - term follow - up radiographs may be helpful to assess further , preferably with standard PA and lateral technique , if feasible .