Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Atelectasis of the left upper lobe with associated volume loss . Left accessory minor fissure excluding the lingula from this atelectatic process . Mediastinal shift to the left . Left juxtaphrenic peak . Spondylotic change of the thoracic spine . Dense contrast material seen in the large bowel .
    OUTPUT:
    
Worsening left upper lobe atelectasis .