Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube terminates 2 .8 cm above the carina . An enteric tube passes below the diaphragm , outside the field of view . There is retrocardiac linear atelectasis at the left lung base . Lung volumes are low with associated crowding of the bronchovascular structures . No pleural effusion or pneumothorax . Heart size is normal . Cardiomediastinal and hilar silhouettes are normal . Surgical clips projecting over the with right upper quadrant are presumably related to cholecystectomy . A radiopaque pin projecting over the left lung apex is likely external to the patient .
    OUTPUT:
    
An endotracheal tube terminates 2 .8 cm above the carina . A radiopaque pin projecting over the left lung apex is presumably external to the patient .