Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volume is moderate . There are no consolidations or nodules . Minimal reticular subpleural opacities at the right lung base , are better characterized in CT of ___ as mild fibrotic changes . Similar subpleural changes are also distributed in the right upper lung . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is normal . Metallic sternal wires are intact and related to previous cardiac surgery . Left pectoral pacemaker has two leads following their expected course and ending in the right atrium and right ventricle .
    OUTPUT:
    
Mild right lung fibrotic changes . No sign of acute cardiopulmonary process .