Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstrated is a left central port , unchanged in location . As compared to chest radiographs dated ___ , there has been partial improvement in the airspace opacities affecting the right lung base and right perihilar region . A stable , small right pleural effusion is noted . There is no new focus of consolidation identified . The left lung is grossly clear , and there is no evidence of pneumothorax . Stable , mild to moderate cardiomegaly is appreciated .
    OUTPUT:
    
Interval improvement in the right perihilar and right lung base airspace opacification .