Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A stimulator device again projects over the left hemi thorax . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Focal scarring appears unchanged in the medial anterior left upper lobe . The lungs appear otherwise clear . No fracture is identified .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease or acute injury .