Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Top - normal heart size is unchanged compared to prior exams dating back to ___ . There is mild perihilar fullness , slightly improved compared to the prior exam . Small bilateral pleural effusions , right greater than left are persistent . Coronary calcifications or stent are identified . Scarring projecting over the mid left lung is persistent . Mild bibasilar atelectasis is unchanged . Right - sided PICC line appears to terminate in the mid SVC . There is no evidence of a pneumothorax .
    OUTPUT:
    
1 . Persistent small bilateral pleural effusions , right greater than left . 2 . Slight interval improvement in the mild to moderate pulmonary edema .