Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest demonstrate significant interval improvement in the right basilar pneumothorax . The left pleural effusion has increased in size since prior imaging . There is no change in the right basilar opacities . Cardiomegaly is mild and stable . A stent is seen which is likely in the SVC . There is a large femoral central line with the tip in the right atrium . A pigtail catheter is again seen in the right lung base .
    OUTPUT:
    
Significantly improved right basilar pneumothorax . Otherwise , essentially unchanged chest radiograph .