Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior exam , there has been little interval change . Partial opacification of the right hemithorax appears similar with loculated pleural effusion ; underlying metastases are better seen on CT . The left lung demonstrates no evidence of edema or infection .
    OUTPUT:
    
Stable opacification of the right hemithorax compared to ___ .