Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is unchanged . Mediastinal contour is normal . There is no pleural effusion or pneumothorax . Streaky retrocardiac opacity has slightly increased from ___ and likely represents atelectasis . There is stable pleural and parenchymal scarring at the right lung base . Partially visualized spinal fusion hardware is present .
    OUTPUT:
    
No evidence of pneumonia . Mild cardiomegaly , unchanged .