Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior exam , an endotracheal tube has been placed . It is approximately 6 cm from the carina , and could be advanced 1 - 2 cm for optimal placement . Otherwise , there is little change since the prior exam , including mild to moderate pulmonary edema , marked cardiomegaly , and small bilateral pleural effusions .
    OUTPUT:
    
Endotracheal tube 6 cm from the carina . This could be advanced 1 - 2 cm for optimal placement . Otherwise no change .