Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest demonstrate well expanded lungs . There is a thin - walled area of increased emphysematous changes at the left lung base consistent with what was previously described . If this area is clinically concerning , could consider a high - resolution CT scan of the chest to look for possible interstitial changes . There is no evidence of acute cardiac or pulmonary process . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Thin - walled area of increased emphysematous changes at the left base . If clinically concern , could consider high - resolution CT imaging . No evidence of acute cardiac or pulmonary process .