Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There relatively low lung volumes . Bibasilar linear subsegmental atelectasis is noted . Left base opacity more likely represents atelectasis rather than consolidation . No pleural effusion or pneumothorax is seen . The cardiac mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Low lung volumes . Bibasilar subsegmental atelectasis without definite focal consolidation .