Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat low . There is no focal consolidation , pleural effusion or pneumothorax . Heart size is top - normal and likely exaggerated by low lung volumes . Mediastinum appears widened , which is due to a tortuous descending aorta . No acute osseous abnormalities identified .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Widened appearance of the mediastinum is due to a tortuous aorta .