Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been overall improvement since prior study including improved ventilation of the left lung and reduction of pleural effusion bilaterally . A Port - A - Cath is seen in place and unchanged in position . Stable mediastinal shift is again noted . There is stable post-radiation and surgical changes noted . There are no areas of consolidation identified . There is no pneumothorax . Pleural surfaces are unremarkable .
    OUTPUT:
    
No evidence of pneumonia . Improvement in lung ventilation and pleural effusion .