Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable semi-erect chest radiograph was obtained . A moderate left pleural effusion and retrocardiac opacity are unchanged . There is no pulmonary edema . The right lung remains clear . Dual - chamber pacing leads project over expected positions . A tunneled right internal jugular dialysis catheter tip terminates in the right atrium . Cardiomegally and aortic arch calcifications are stable .
    OUTPUT:
    
Stable moderate right pleural effusion and retrocardiac opacity .