Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Again seen is increased opacity at the left lung base , questionable progressed since prior . There are also relatively stable opacities at the lung apices . There is no evidence of new consolidation , effusion . The cardiomediastinal silhouette is unchanged . Atherosclerotic calcifications noted at the aortic arch . No acute osseous abnormality is identified . Chain sutures project over the left upper lung .
    OUTPUT:
    
Chronic changes in the lungs , with questionable increased opacity in the left midlung .