Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right chest wall Port - A - Cath is unchanged in position , ending in the right atrium . Blunting of the right costophrenic angle with a right basilar opacity has mildly improved . The left lung is grossly clear . There is no pneumothorax .
    OUTPUT:
    
Mild interval improvement of right basilar opacity . No pneumothorax .