Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is retrocardiac opacity with a spine sign on the lateral view . Right basilar opacity is likely atelectasis . Superiorly the lungs are clear . The cardiomediastinal silhouette is grossly stable although is silhouetted on the left and difficult to accurately assess . Left chest wall dual lead pacing device is noted . Surgical clips in the right upper quadrant are noted . No acute osseous abnormalities .
    OUTPUT:
    
Left lower lobe consolidation compatible with pneumonia in the proper clinical setting . Repeat after treatment suggested to document resolution .