Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are normal . Lung volumes are increased , but lungs are grossly clear except for a small linear area of opacity at the left base , which may reflect localized linear atelectasis or scar . There are no pleural effusions . Bones are diffusely demineralized , and note is made of mild scoliosis .
    OUTPUT:
    
No radiographic evidence of pneumonia .