Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior CXR of ___ , there has been slight interval improvement in appearance of interstitial opacities , which likely reflects both better ventilation and improving interstitial edema . There is bibasilar atelectasis . Left pleural effusion seen on the prior radiograph appears to have resolved . Left lung base opacity described on the prior study is not well demonstrated on today 's study due to overlying pacemaker . The ventricular lead of the pacemaker is stable in position . However , the right atrial lead is currently in the right atrial appendage , previously in the right atrium proper ___ ___ . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
1 . Less prominent interstitial markings , which reflects improved ventilation and resolving interstitial edema . 2 . Right atrial lead of pacemaker has slightly changed its position since ___ , currently within the atrial appendage .