Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of the chest tubes on the right . Linear pockets of air are visible along the tracks of previous chest tubes which could be in the subcutaneous tissue or pleural space . Subcutaneous air at the right lateral chest wall is similar to prior . The right - sided pleural effusion is unchanged .
    OUTPUT:
    
Linear pockets of air along the tracks of previous chest tubes could be in the subcutaneous tissue or pleural space . Follow up chest radiograph is recommended .