Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . Enlargement of the hila bilaterally is unchanged , and compatible with of the history of pulmonary arterial hypertension . The patient is status post right upper lobectomy with evidence of volume loss in the right lung and mild rightward shift of mediastinal structures . Postsurgical scarring in the right lung base are also similar compared to the prior study . There is a small to moderate size hiatal hernia . No pulmonary vascular congestion is seen . Minimal patchy right basilar opacity could reflect atelectasis , aspiration or infection . No pneumothorax is identified . Chronic right costophrenic angle blunting is compatible with pleural thickening . Multiple old right - sided rib deformities are again demonstrated .
    OUTPUT:
    
Postsurgical changes of the right lung with patchy opacity in the right lung base possibly reflecting atelectasis but aspiration or infection can not be excluded .