Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study ___ , the right pleural effusion has increased , now moderate in size . There is likely compressed atelectasis . There is new obscuration of the left heart border with increased left - sided airspace opacities . In the absence of pulmonary vascular engorgement , this is concerning for a left lower lobe pneumonia .
    OUTPUT:
    
1 . Increased left - sided airspace opacities concerning for left lower lobe pneumonia . 2 . Interval increase in right pleural effusion , now moderate .