Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal and the lungs are clear . No pleural effusion , pneumothorax or focal airspace consolidation . Heart is top normal in size . Mediastinal and hilar contours are unremarkable . Degenerative changes are seen in the right acromioclavicular joint .
    OUTPUT:
    
No acute cardiopulmonary abnormality .