Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest . A left internal jugular central venous line ends in the right atrium . Tracheostomy is in place . Sternotomy wires and a cardiac valve are unchanged . There is slightly better aeration of the lungs with some residual interstitial edema . Small left pleural effusion is unchanged . Retrocardiac opacity is decreased .
    OUTPUT:
    
Slight decrease in mild interstitial edema , unchanged small left pleural effusion , and slight decrease in retrocardiac opacity likely representing atelectasis .