Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left upper lung is opacified , due to a combination of atelectasis and pneumonia seen on the CT chest from ___ . The left lower lobe is clear without focal consolidation or effusion . Right Port - A - Cath terminates at the cavoatrial junction . The right lung is clear without pleural effusion , focal consolidation , or pneumothorax . No left pleural effusion or pneumothorax . The left heart border can not be evaluated .
    OUTPUT:
    
Opacification of the left upper lung is due to a combination of atelectasis and pneumonia , seen on the CT chest from ___ .