Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a left upper chest pacer device with a single associated lead in unchanged position . The cardiomediastinal silhouettes are stable . The bilateral hila are unremarkable . There is no pulmonary vascular congestion . Apparent increased opacity at the right cardiophrenic angle likely represents crowding of bronchovascular structures , and appears similar to chest x-ray from ___ . Otherwise , the lungs are clear . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process .