Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is intubated . The endotracheal tube lies below the thoracic inlet , approximately 5 cm above the carina ; previously it closely approached the carina . An orogastric tube courses into the stomach , it s distal course not imaged . The heart is at the upper limits of normal size . The mediastinal and hilar contours are unremarkable . There is a focal hazy opacification projecting over the left upper lung while the left lung base appears clear . Although a confounding factor is moderate rightward convex scoliosis , there is a suggestion of mild volume loss with leftward shift of mediastinal structures . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
Hazy appearance of left upper lung with suspected volume loss , an appearance suggesting extensive atelectasis of the left upper lobe .