Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged , but similar when compared to the prior study . The mediastinal contour is stable . There is crowding of the bronchovascular structures , with probable mild vascular engorgement . No focal consolidation , large pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary vascular congestion in the setting of low lung volumes .