Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right basilar opacity and left pleural effusion have improved since ___ . There is no pulmonary edema , pleural effusion or pneumothorax . The heart size is top normal . The mediastinal contours are normal . There is no free air beneath the diaphragm .
    OUTPUT:
    
Interval improvement of the previously seen right basilar opacity and left pleural effusion . No new opacity .