Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . Linear opacities in the left mid to lower lung are not significantly changed , likely minimal scarring . The lungs are otherwise clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
No acute cardiac or pulmonary process .