Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 06 : 23 is submitted
    OUTPUT:
    
Lung volumes are low with crowding of the vasculature and bibasilar patchy opacities likely reflecting atelectasis rather than aspiration or pneumonia . Clinical correlation is advised . Probable small layering left effusion . Overall cardiac and mediastinal contours are stable . A feeding tube is seen coursing below the diaphragm with the tip not identified . Endotracheal tube has its tip approximately 6 cm above the carina . No pneumothorax .