Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hypoinflated with crowding of vasculature . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . There is mild pneumopericardium and pneumomediastinum . An endotracheal tube tip is entering into the right mainstem bronchus .
    OUTPUT:
    
1 . Subtle pneumomediastinum and pneumopericardium . 2 . Right main stem bronchus intubation . Consider withdrawing 2 .5 cm for better positioning