Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The examination is unchanged since ___ . The central pulmonary vessels are prominent , but there is no edema . Surgical clips within the right upper chest are again seen , where there is a right upper lobe mass , unchanged over multiple prior studies . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No pulmonary edema .