Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously appreciated right mediastinal fullness has completely resolved on today 's examination . Cardiomediastinal silhouette and hilar contours are normal . Lungs are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Complete resolution of right mediastinal fullness . No acute cardiopulmonary process .