Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy is stable in position . A Dobbhoff tube is seen terminating in the stomach antrum . Cardiomediastinal and hilar contours are unchanged . Lung volumes are low . Opacity at the left lung base is new from the prior study and likely represents atelectasis . A small right pleural effusion is unchanged . There is no evidence of pneumothorax
    OUTPUT:
    
1 . Left basilar opacity is likely representative of atelectasis . 2 . Small right pleural effusion unchanged .