Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Patient is intubated with the tip of the endotracheal tube positioned 4 .5 cm above the carinal . An NG tube courses into the left upper abdomen . Overlying EKG leads are present . There are subtle lower lung opacities which likely represent a combination of atelectasis with possible superimposed aspiration . No large effusion or pneumothorax . Cardiomediastinal silhouette appears stable . No acute osseous abnormality .
    OUTPUT:
    
Endotracheal and nasogastric tubes positioned appropriately . Subtle lower lung opacities likely atelectasis versus mild aspiration .