Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right - sided IJ which terminates in the mid SVC . There has been slight interval improvement in the large right pleural effusion compared to the prior exam . Left lung appears to be well aerated without concerning focal consolidations . There is no evidence of a pneumothorax . There is mild cardiomegaly . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Slight interval improvement in the large right pleural effusion compared to the prior exam .