Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is new near complete opacification of the left hemithorax without appreciable deviation of the trachea and mediastinum . Increased lucency over the left upper lung field may be due to the aerated superior segment left lower lobe , but a loculated pneumothorax can not be excluded . There is increased left lower lobe subsegmental atelectasis .
    OUTPUT:
    
Increased lucency over the left upper lung field may be due to the aerated superior segment left lower lobe , but a loculated pneumothorax can not be excluded . A repeat radiograph with the patient in a more upright position is recommended . Increased left lower lobe subsegmental atelectasis .