Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette including cardiomegaly is unchanged . Calcifications are again noted in the aortic arch . Low lung volumes persist . Blunting of the left costophrenic sulcus could be due to atelectasis or a small effusion . Linear opacity at the left base is most compatible with atelectasis . The lungs are clear . There is no pneumothorax .
    OUTPUT:
    
Persistent low lung volumes and basilar atelectasis .