Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided PICC line terminates in the upper right atrium . The endotracheal tube ends in the midtrachea . Bilateral airspace opacities have improved since the study of 1 day prior . Bilateral hilar and mediastinal lymphadenopathy is unchanged . The heart is within normal limits . There is no pneumothorax .
    OUTPUT:
    
Improved airspace opacities which may be due to resolving infection or edema .