Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , the allowing for differences in positioning , the overall appearance is similar . As before , there bibasilar opacities , probably with a small right pleural effusion . The degree of opacity at the right base could be slightly in increased . There is vascular plethora , consistent with CHF , similar to the prior study . Again seen is increased retrocardiac opacity at the left base , compatible with left lower lobe collapse and / or consolidation , probably with a small effusion . Question elevation left hemidiaphragm with versus a dense band of atelectasis coursing superiorly to the left chest wall . Dual lead pacemaker again noted , with tips overlying right atrium and right ventricle . No pneumothorax detected .
    OUTPUT:
    
Possible slight increase in right base opacity . CHF , similar to prior .