Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is unchanged opacity in the left mid lung which likely represents residual scarring in this patient with prior pneumonia in this region . Nipple shadows are noted bilaterally . No definite signs of acute consolidation , effusion or pneumothorax . No signs of pulmonary edema . The heart size and mediastinal contour are unremarkable . The bony structures are intact .
    OUTPUT:
    
Vague opacity residua in the left mid to lower lung likely represents scarring in this patient with history of pneumonia in this region . No acute findings .