Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , again seen is opacification at the right base , with an effusion and fluid in the right minor and major fissures . This opacification could be due to atelectasis and effusion , however in the appropriate clinical setting , could represent pneumonia . There is increased aeration of the left lung base . There is no change in mild vascular congestion . There is no edema . No pneumothorax is seen . The cardiac and mediastinal silhouettes are unchanged . A right PICC is unchanged in position .
    OUTPUT:
    
Right basilar opacity , may represent atelectasis and effusion , however in the appropriate clinical setting , could represent pneumonia .