Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the immediate prior study of ___ , there is little relevant change . 2 right - sided pigtail catheters are in unchanged position . There is no pneumothorax . The moderate empyema is unchanged . The left lung is clear . There is no focal consolidation , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Unchanged moderate empyema . No pneumothorax .