Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate a large right pneumothorax measuring 4 .5 cm at the apex with associated flattening of the right hemidiaphragm . There is no mediastinal shift . The left lung is clear . The mediastinal and hilar contours are normal . There is no pleural effusion .
    OUTPUT:
    
Large right pneumothorax with associated flattening of the right hemidiaphragm . No mediastinal shift . Findings were discussed with Dr . ___ by Dr . ___ ___ the telephone on ___ at 12 : 10 , ___ min after they were made .