Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable upright frontal chest radiograph demonstrates interval removal of the left PICC . The cardiomediastinal silhouette is normal and the lungs are fairly well aerated . There is persistent opacity at the right lung base , increased compared to the prior chest radiograph , likely corresponding to the small to moderate pleural effusion seen on CT from the day prior . Superimposed pneumonia can not be excluded in the right clinical setting . There is no evidence of vascular congestion or pulmonary edema . No pneumothorax is identified . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
1 . No evidence of vascular congestion or pulmonary edema . 2 . A right base opacity , increased compared to ___ , likely corresponds to the small to moderate pleural effusion seen on CT from the day prior . However superimposed pneumonia would be difficult to exclude . Follow up to resolution is recommended .