Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph demonstrates low lung volumes with increased right pleural effusion with scars at the level of the lower right hilus previously identified . The left lung appears clear , although there is increased left - sided pleural effusion with associated atelectasis . Secondary to overlying densities , it is difficult to appreciate exact placement of tracheal cannula . There is no pneumothorax . There has been interval removal of right central line .
    OUTPUT:
    
Secondary to overlying densities , placement of tracheal cannula difficult to interpret . Bilateral pleural effusions have increased in size .