Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube remains in unchanged position . Heart size remains mildly enlarged . Mediastinal and hilar contours are stable , with calcification of the aortic knob re - demonstrated . There is no pulmonary vascular congestion . Patchy opacity is noted within the right upper lung field , which appears new compared to the previous exams . Retrocardiac opacity could reflect atelectasis . No large pleural effusion is seen though a small left pleural effusion can not be completely excluded . There is no pneumothorax . No acute osseous abnormalities are present .
    OUTPUT:
    
1 . Patchy opacity within the right upper lung field which appears new compared to the previous exam . This is a nonspecific finding and could be related to inflammation or infection . 2 . Left basilar opacity could reflect atelectasis . A trace left pleural effusion is not excluded .