Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right chest wall single lead pacemaker . Heart size is moderately enlarged , but stable from the prior chest x-ray . Heterogeneous opacification of the lung bases may represent atelectasis and / or a small amount of pleural fluid versus opacity due to overlying soft tissues . No obvious evidence of pneumonia .
    OUTPUT:
    
Poor quality portable chest radiograph demonstrating stable cardiomegaly and no obvious evidence of pneumonia .