Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes remain low , which accentuates the appearance of the pulmonary vasculature . Subtle right base opacity also noted on the recent chest CT and stable since prior radiograph from ___ , likely chronic change . There is no new focal consolidation concerning for pneumonia . The bilateral costophrenic angles appear blunted , which is unchanged from the most recent prior study . No pneumothorax is detected . The cardiac silhouette is moderately enlarged but stable . Calcification of the aortic knob and mild tortuosity of the thoracic aorta is unchanged . The mediastinal contours are within normal limits . Hilar contours are stable .
    OUTPUT:
    
1 . No significant interval change .