Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP portable radiograph of the chest was acquired . The endotracheal tube is appropriately positioned , ending 2 .4 cm above the level of the carina . An enteric catheter courses below the level of the diaphragm and out of the field of view inferiorly . The lungs are clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . The bony thorax is grossly intact .
    OUTPUT:
    
No acute cardiac or pulmonary process .