Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP chest radiograph demonstrates an endotracheal tube which appears to terminate 3 .8 cm above the level of the carina in appropriate position . Heart size is within normal limits . Hilar contours are unremarkable . No evidence of pulmonary edema . Reticular opacities are noted at bilateral lung bases and right apex . This may reflect an interstitial process . No large pleural effusion or pneumothorax is seen . Visualized osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality . Endotracheal tube in appropriate position . Reticular opacities at the lung bases and right apex may reflect scarring .