Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval decrease in ground - glass opacity bilaterally compared to prior study of ___ at 4 :22 p .m . , which represents decrease in pulmonary edema . There has been interval decrease in observed cardiomegaly . There is bilateral small amount of pleural effusion . There are no areas of focal consolidations and no pneumothorax . The pleural surfaces are unremarkable . The endotracheal tube is no less than 6 .2 cm from the carina , could be advanced 2 cm for optimal placement .
    OUTPUT:
    
Interval reduction in pulmonary edema and cardiomegaly . ET tube can be advanced 2 cm for optimal placement .