Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate an enlarged cardiac silhouette , which may in part be due to low lung volumes . There is no focal consolidation or pneumothorax . There are bilateral small pleural effusions . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
1 . The cardiac silhouette is enlarged , increased in size compared to ___ . Although this could represent recurrent pericardial effusion , it may be related to lower lung volumes . Echocardiography may be more helpful in the detection of pericardial effusion . 2 . Bilateral small pleural effusions .