Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Allowing for changes in positioning and lung volumes , the small right pleural effusion and adjacent compressive atelectasis is probably unchanged compared with ___ . The right - sided pigtail catheter is in unchanged position . The left chest wall atrial and biventricular pacemaker leads are in standard position . There is moderate stable cardiomegaly .
    OUTPUT:
    
Unchanged small right pleural effusion .