Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . The heart size is normal . Mediastinal contours are normal . There is mild diffuse demineralization .
    OUTPUT:
    
No radiographic evidence for persistent cough , however this study does not constitute a thorough evaluation for either central or peripheral airways .