Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP supine portable chest radiograph is obtained . Endotracheal tube tip resides 2 .5 cm above the carina . NG tube courses into the left upper abdomen , tip not included in field of imaging . The lungs appear mostly clear bilaterally . There may be a tiny retrocardiac atelectasis . No large effusion is seen . Cardiomediastinal silhouette appears normal . No bony abnormalities are detected .
    OUTPUT:
    
ET and NG tubes positioned appropriately . Possible left lower lobe mild atelectasis .