Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes and bibasilar atelectasis . There is blunting of the posterior left costophrenic angle which may be due to a trace pleural effusion . Previously noted subtle right apical opacity is less conspicuous than on the prior study . This lateral left basilar atelectasis / scarring , similar to prior . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Low lung volumes and mild basilar atelectasis . Blunting of the posterior left costophrenic angle may be due to a trace pleural effusion . Previously noted subtle right apical opacity is less conspicuous than on the prior study . Apical lordotic view may be helpful in further assessing this location .