Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lungs appear hyperinflated which could reflect underlying COPD . A linear density in the left mid lung is likely a focus of scarring . No focal consolidation , effusion or pneumothorax is seen . No convincing signs of edema . The heart is top - normal in size . Mediastinal contours unremarkable . Subtle suggestion of mitral annular calcification is noted . Bony structures appear intact though demineralized throughout .
    OUTPUT:
    
COPD without superimposed pneumonia or CHF .