Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . The mediastinal and hilar contours are normal . Again , there is marked improvement of a right - sided pleural effusion with residual fluid in the posterior costophrenic recess with minimal associated atelectasis . There is no pneumothorax .
    OUTPUT:
    
Minimal residual righ pleural effusion .