Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously described right infrahilar subtle opacity has improved . No new focal consolidation or pleural effusion . Streaky opacity in the left lung base is likely atelectasis . No pneumothorax . Cardiomediastinal silhouette is unchanged . Atherosclerotic calcifications of the aortic arch are again seen .
    OUTPUT:
    
No acute cardiopulmonary process . Previously described right infrahilar opacity has improved .