Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes . There is mild atelectasis at the lung bases . A consolidation . Projecting over the posterior lower lobes on the lateral view appears unchanged from multiple prior studies and may represent sequela of prior left lower lobe wedge resection . No left apical pneumothorax is seen .
    OUTPUT:
    
1 . No left apical pneumothorax . 2 . Left lower lobe opacity is unchanged from ___ and may represent postsurgical change , however underlying infection can not be excluded .