Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-upright portable AP chest radiograph was obtained . An NG tube is seen coiled in the left upper quadrant . The endotracheal tube tip is located 4 .7 cm above the carina . Lung volumes are low with scattered subsegmental atelectasis in the left upper and lower lobes . No large effusion or pneumothorax . Heart size is top normal . Mediastinal contour appears somewhat prominent , likely technique related . Bony structures appear grossly intact .
    OUTPUT:
    
Appropriate positioning of ET and NG tubes . Scattered subsegmental atelectasis and top normal heart size .