Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low ; chronic interstial abnormality , mostly in the right lower lung has reticular features suggesting fibrosis . Changes of median sternotomy , including fractured uppermost wire and misalignment of fifth wire are chronic . Mild cardiomegaly and central venous congestion are unchanged . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .