Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . Normal heart size , mediastinal and hilar contours . Linear opacity in the left lower lung likely reflects atelectasis . No large pleural effusion or pneumothorax . The TIPS stent is in unchanged position in the right upper quadrant
    OUTPUT:
    
Low lung volumes with linear left lower lobe atelectasis .