Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pleural and parenchymal scarring with associated calcified pleural plaques appears similar to prior studies dating back to ___ when allowances are made for technical differences between the exams . Lungs are otherwise clear , and there are no pleural effusions . Heart size , mediastinal and hilar contours are normal . Overall , lungs are slightly overinflated , in keeping with known history of emphysema on prior chest CT exams . Bones are diffusely demineralized .
    OUTPUT:
    
Stable radiographic appearance of the chest with no evidence of pneumonia .