Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , with persistent moderate cardiomegaly . A left chest wall pulse generator with 2 leads terminating in the right atrium and right ventricle are unchanged . Bibasilar atelectasis is noted , along with a left pleural effusion . Infrahilar hazy right opacity increased since the prior is worrisome for pneumonia .
    OUTPUT:
    
Right lower lobe opacity is concerning for pneumonia . Left pleural effusion and stable moderate cardiomegaly .