Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The heart size is mildly enlarged . There is mild widening of the superior mediastinum likely due to low lung volumes . There is mild pulmonary vascular engorgement . No pleural effusion or focal consolidation is present . Small amount of fluid ; however , is seen within the fissures . There is no pneumothorax . Multilevel degenerative changes are present within the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion . Low lung volumes .