Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear probably unchanged allowing for differences in technique including rotation and S - shaped thoracolumbar curvature . The lungs appear clear . There is no pleural effusion or pneumothorax . The bones appear demineralized .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .