Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 04 :36 is submitted .
    OUTPUT:
    
Endotracheal tube and right internal jugular central line unchanged in position . Nasogastric tube coursing below the diaphragm with the tip not identified . Layering left effusion with associated airspace opacity may reflect compressive atelectasis , although pneumonia can not be excluded . Patchy opacity at the right base likely represents atelectasis . There continues to be perihilar vascular congestion but no overt pulmonary edema . No pneumothorax .