Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest film ___ 11 : 12 is submitted .
    OUTPUT:
    
Endotracheal tube has its tip 4 cm above the carina . The right subclavian PICC line is unchanged . There has been interval removal of the nasogastric tube . Cardiac and mediastinal contours are stable . There is improving aeration at the left base with residual patchy opacity which likely reflects persistent partial lower lobe atelectasis . Overall , the pulmonary markings are more prominent which suggests a component of superimposed mild pulmonary edema . Clinical correlation is advised . No pneumothorax .