Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volume is low . Small left pleural effusion is similar to ___ . Cardiac silhouette and pulmonary vasculature is exaggerated by low lung volumes . There is no focal consolidation . Known rib fractures seen on prior CT is not visualized on this radiograph .
    OUTPUT:
    
Small left pleural effusion is similar to compared to ___ . Known rib fractures seen on prior CT is not visualized on this radiograph .