Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are lower in comparison to the prior study . There is some opacification of the left base which may represent atelectasis and less likely pneumonia , that could be better evaluated with PA and lateral radiographs . Again seen are multiple calcified pleural and diaphragmatic plaques consistent with prior asbestos exposure . The cardiomediastinal silhouette and hilar contours are unchanged . The pleural surfaces are normal without effusion or pneumothorax .
    OUTPUT:
    
Opacification seen at the left base , which is most consistent with atelectasis and less likely pneumonia however differences in projection and levels of inspiration make it difficult to compare . Suggest PA and lateral radiographs for better evaluation .