Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is a retrocardiac opacity , likely reflecting atelectasis . No right pleural effusion . There is mild cardiomegaly . An ET tube terminates approximately 4 cm above the carina . An enteric tube terminates in the stomach .
    OUTPUT:
    
1 . A enteric tube terminates in the stomach . 2 . Low lung volumes , with atelectasis at the left lung base