Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is redemonstration of a small right pneumothorax , not significantly changed in size compared to the prior study from ___ . Two right - sided pleural catheters are unchanged in position . There is evidence of prior aortic valve replacement . Midline sternotomy wires are intact . Mild right basilar atelectasis is unchanged . There may be a small right pleural effusion . Minimal left basilar atelectasis is unchanged . There is no left pneumothorax . Improving post-operative changes in right paramediastinal region .
    OUTPUT:
    
Unchanged small right pneumothorax , with two pleural catheters in place .