Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large right pleural effusion is minimally increased in size compared to the prior exam . Right basilar opacity likely reflects compressive atelectasis . The heart size is difficult to assess given the presence of the large right pleural effusion . Mediastinal contour where visualized appears unchanged with similar leftward shift of mediastinal structures . No pulmonary edema is seen . The left lung is clear . No pneumothorax is identified .
    OUTPUT:
    
Minimal increase in size of large right pleural effusion with right basilar opacity likely reflective of compressive atelectasis .