Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval improvement of the previously seen bilateral pleural effusions . Blunting of the left costophrenic angle and retrocardiac opacity suggests a left pleural effusion , and no significant right pleural effusion is noted . There is continued collapse and / or consolidation at the left base , improved compare with the ___ radiograph . Bilateral pleural catheters are again noted , 1 and each lung base . The cardiac mediastinal silhouette is normal , allowing for slight unfolding of the aorta . There is borderline upper zone redistribution , but no overt CHF . Left - sided pacemaker type device is again noted , with lead tips over the right atrium and right ventricle . No pneumothorax detected .
    OUTPUT:
    
Small left effusion , with underlying collapse and / or consolidation , slightly improved on the left can considerably improved on the right , compared with ___ . No overt CHF . No pneumothorax detected .