Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There has been no significant change from prior exam allowing for slight differences in technique . Slightly lower lung volumes with minimally increased left basal atelectasis is noted . Stable hazy opacity at the right lateral lung base likely reflect prior surgery . No large effusion or pneumothorax is seen . No signs of edema . The cardiomediastinal silhouette is stable . Chronic right rib resections noted .
    OUTPUT:
    
Mild left basal atelectasis . Postsurgical changes in the right hemithorax . No evidence of pneumonia .