Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is unchanged . Bilateral mild basilar atelectasis is stable . A subtle right infrahilar opacity is seen compared with previous studies which may represent atelectasis versus a developing pneumonia in for which lateral views of help in further evaluation . No focal consolidations or pleural effusions are seen . Stable postoperative changes to the right upper quadrant are seen
    OUTPUT:
    
1 . Right infrahilar atelectasis or pneumonia . 2 . Stable bilateral mild bibasilar atelectasis .