Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-erect , portable frontal chest radiographs again demonstrate a right PICC with the tip in the mid SVC and multiple sternal wires . Lung volumes are low , with increased prominence of the cardiac silhouette and bronchovascular crowding . There is increased opacity at the right lung base , which could represent a small pleural effusion with associated atelectasis , but superimposed pneumonia can not be excluded . There is also mild pulmonary edema . There is a small amount of pleural fluid seen within the left fissure . Retrocardiac opacity is likely secondary to atelectasis , and is slightly increased compared to the prior chest radiograph . No pneumothorax is identified .
    OUTPUT:
    
1 . Right base opacity , which could represent a combination of small right pleural effusion and associated atelectasis , but a superimposed infection can not be excluded . Retrocardiac / left base opacity is likely related to atelectasis . 2 . Mild pulmonary edema .