Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As on prior , low lung volumes are slightly low . There is no pulmonary vascular congestion , new since prior . There is no effusion or focal consolidation . Cardiac silhouette is mildly enlarged as on prior . Hypertrophic changes are noted in the spine .
    OUTPUT:
    
Pulmonary vascular congestion without focal consolidation .