Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volume is low . There is no focal consolidation , pleural effusion , or pneumothorax . Borderline enlarged cardiac silhouette is exaggerated by low lung volumes . Pulmonary vascular congestion is mild may also be exaggerated by low lung volumes .
    OUTPUT:
    
No radiographic evidence of pneumonia . Mild pulmonary vascular congestion .