Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardio mediastinal silhouette is unchanged . Stable cardiomegaly . Increased opacity in the right lung base likely combination of atelectasis with small right pleural effusion . In the right clinical setting , consider superimposed pneumonia or aspiration . There is no pneumothorax .
    OUTPUT:
    
No pulmonary edema . Right base opacity likely atelectasis with effusion , however superimposed pneumonia or aspiration can be considered in the right clinical setting .