Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding similar study of ___ . Marked cardiac enlargement as before . Pulmonary vascular pattern is extremely congested and mostly centrally located parenchymal densities are rather typical for pulmonary edema . There are in addition some patchy infiltrates mostly in the right hemithorax which raises the possibility of superimposed infectious processes . Comparison with the next preceding study of ___ , aeration of the left hemithorax lower area appears to have improved slightly . Comparison is extended to the portable chest examination of ___ , at which time bilateral central pulmonary edema pattern was even more marked . A right internal jugular approach central venous line remains in unchanged position terminating in the mid portion of the SVC as before on ___ .
    OUTPUT:
    
Pulmonary edema , slightly improved since initial examination of ___ . No major atelectasis identified .