Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lung atelectasis is persistent but improved . Unchanged left apical pleural thickening and left lung subcentimeter nodules . Lungs are otherwise clear without new focal consolidation concerning for pneumonia . The heart is top normal in size , stable . An air - fluid level in the posterior mediastinum is consistent with previous history of neo-esophagus .
    OUTPUT:
    
No evidence of pneumonia .