Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube ends about 2 cm above the carina . Compared to yesterday , the lung volume has decreased and there is a new left retrocardiac opacity , likely atelectasis . There is mild , new edema . Small left effuion is stable .
    OUTPUT:
    
Decreased lung volumes , new retrocardiac atelectasis , and new mild edema .