Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single frontal upright view of the chest was obtained portably . Changes from prior left thoracotomy are similar in appearance to prior studies . Healed right - sided rib deformities are also noted . There is no focal consolidation or pneumothorax . Bibasilar atelectasis is noted . Blunting of the left costophrenic sulcus may be due to tiny pleural fluid or pleural thickening given the prior pleural effusion . Cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
No pneumonia or edema .