Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged but unchanged . The mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Small bilateral pleural effusions are noted along with patchy opacities in the lung bases , likely atelectasis . No pneumothorax is visualized . There are mild multilevel degenerative changes demonstrated in the thoracic spine and severe degenerative changes are also seen involving both shoulders .
    OUTPUT:
    
Small bilateral pleural effusions with probable bibasilar atelectasis .