Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A moderate size right pleural effusion has increased in size compared to the previous exam . Right basilar opacity may reflect compressive atelectasis though infection is not excluded . Aeration of the left lung base is improved with residual streaky opacity likely reflecting atelectasis . Heart size is difficult to assess given the presence of the moderate right pleural effusion . Mediastinal and hilar contours are relatively unchanged . Mild pulmonary edema vascular congestion is demonstrated . Small left pleural effusion has decreased in size . There is no pneumothorax . Degenerative changes are seen within the thoracic spine .
    OUTPUT:
    
Increased size of moderate right pleural effusion . Decreased size of small left pleural effusion . Patchy bibasilar airspace opacities , worse on the right and improved on the left may reflect areas of atelectasis though infection is not excluded . Mild pulmonary vascular congestion .