Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overall , there is improvement compared to most recent study . Swan - Ganz catheter ends in appropriate position . Endotracheal tube ends in the low trachea above the carina . Multiple mediastinal drains are again seen and in place . Nasogastric tube passes into the stomach and out of view . Extensive packing material in the mediastinum obscures the view of the other material . The mediastinum is still wide but decreased compared to most recent study . Moderate cardiomegaly is unchanged . Likely left pleural effusion layers posteriorly , however , has decreased . Mild pulmonary edema has decreased . Atelectasis in the left lung base and right upper lobe is decreased .
    OUTPUT:
    
Overall improvement in pulmonary edema , effusion , and atelectasis .