Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is top - normal . Mediastinal contours are unremarkable . Aortic knob calcification is again noted . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Degenerative change is incidentally noted at the right acromioclavicular joint .
    OUTPUT:
    
No acute cardiopulmonary process .