Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Mitral annular calcifications are present . The heart is mild to moderately enlarged . The aortic arch is partly calcified . The mediastinal and hilar contours appear unchanged . Blunting of the left costophrenic angle suggests a small effusion . There is mild - to - moderate interstitial abnormality suggesting pulmonary vascular congestion . The bones appear demineralized . Moderate degenerative changes are noted along each shoulder . Mild degenerative changes and slightly exaggerated lordotic curvature are present throughout the thoracic spine .
    OUTPUT:
    
Mild - to - moderate interstitial abnormality most suggestive of pulmonary vascular congestion .