Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker with dual leads is seen in unchanged an appropriate position . Heart size is enlarged . The mediastinal and hilar contours are normal . The pulmonary vasculature is not engorged and there are is no evidence of pulmonary edema . There is a focal , retrocardiac retrocardiac opacity concerning for pneumonia . Opacity at the base of the right lung could represent atelectasis or infection . No pneumothorax is seen . There are small bilateral pleural effusions .
    OUTPUT:
    
Probable bibasilar pneumonia . Moderate cardiomegaly . No definite pulmonary edema . Small bilateral pleural effusions are presumed .