Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . Tracheostomy appears in similar position to prior , overlying the trachea . Lung volumes are low . No focal consolidation , pleural effusion , or pneumothorax . Heart size and cardiomediastinal contours are stable .
    OUTPUT:
    
Low lung volumes without evidence for acute cardiopulmonary process . Tracheostomy appears in similar position to prior .