Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volume is small . Diffuse airspace opacities , right more severe than left , are unchanged . Superimposed pneumonia can not be ruled out . Right basilar atelectasis is stable . No large pleural effusion . No pneumothorax . Severe cardiomegaly is unchanged . The mediastinal silhouette is unchanged .
    OUTPUT:
    
Stable chest radiograph with persistent diffuse airspace opacity is unchanged . Superimposed pneumonia can not be ruled out .