Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear unchanged . The lung volumes are low . There is no pleural effusion or pneumothorax . Patchy retrocardiac opacity suggests minor atelectasis or scarring . Otherwise , the lungs appear clear . Mild rightward convex curvature is centered along the mid thoracic spine , where there is also mildly exaggerated kyphotic curvature . Associated with this appearance is minimal unchanged anterior wedging of mid thoracic vertebral bodies , as well as suspected bony demineralization . There has been no significant change .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .