Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the endotracheal tube is approximately 3 cm from the carina . There is slight interval aeration of the left upper lobe with continued collapse of the left lower lobe . Atelectasis at the right lung base has increased . Evaluation of the heart is obscured .
    OUTPUT:
    
Endotracheal tube tip is 3 cm from the carina . Improved ventilation of the left lung apex .