Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are normal . There has been interval resolution of the right - sided pleural effusion . Right apical post radiation fibrosis is unchanged . Lungs are otherwise clear . There is no pneumothorax or recurrent pleural effusion .
    OUTPUT:
    
Interval resolution of a prior right - sided pleural effusion .