Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . The heart size is mildly enlarged . Mediastinal and hilar contours are unchanged with similar fullness of the superior mediastinum attributable to mediastinal fat . There is no pulmonary vascular congestion . No focal consolidation , pleural effusion or pneumothorax is identified . There are multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Low lung volumes . Otherwise no acute cardiopulmonary process .