Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates interval improvement in previously seen right lung base opacity . There is persistence of a right mid lung opacification which could represent an infectious process in the appropriate clinical setting . There is bilateral pulmonary edema which is unchanged since the prior study . Right PICC line is unchanged in position .
    OUTPUT:
    
Interval improvement in right lung base opacification consistent with recent thoracentesis . There is no pneumothorax . Right mid lung opacification persists and pulmonary edema is unchanged since the prior study .