Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi upright radiograph of the chest demonstrates low lung volumes which results in bronchovascular crowding . The hila are slightly less prominent as compared to the prior study , suggesting improving vascular congestion . There is a new opacification in the left upper lobe , which may represent atelectasis or aspiration . The cardiomediastinal contours are unchanged . There is no pneumothorax or pleural effusion . The endotracheal tube and 2 .4 cm from the carina . Nasogastric tube courses into the stomach .
    OUTPUT:
    
1 . Improvement in pulmonary vascular congestion . 2 . Endotracheal tube ends 2 .4 cm from the carina . 3 . New opacification in the left upper lobe may represent atelectasis or aspiration .