Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting semi-upright position . Comparison is made with the next preceding similar study of ___ . The marked pulmonary congestive pattern including bilateral pulmonary edema seen on the preceding examination has improved markedly . Still pleural densities are present along the lateral walls of the chest , particularly on the left side . No new infiltrates are seen . No pneumothorax has developed . Status post sternotomy and bypass surgery as well as position of right internal jugular approach central venous line unchanged .
    OUTPUT:
    
Some improvement of pulmonary edema . No new abnormalities .