Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes with resultant bronchovascular crowding . The cardiomediastinal and hilar contours are unchanged . There has been an interval increase in the degree of retrocardiac opacity , which may represent developing pneumonia . Right basalar atelectasis is not significantly changed . There is no pneumothorax or significant pleural effusion . Endotracheal tube is less than 2 cm from the carina . A right - sided internal jugular central venous line ends at the mid SVC . The nasogastric tube ends in the stomach with the last sideport above the GE junction .
    OUTPUT:
    
1 . Endotracheal tube is less than 2 cm from the carina and should be pulled back 2 - 3 cm . 2 . The NG tube ends in the stomach with the last sideport above the GE junction , and should be advanced prior to use . 3 . There has been an interval increase in the degree of retrocardiac opacity , which may represent developing pneumonia .