Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . A right - sided central venous dialysis catheter is again seen without significant change in position , terminating in the right atrium , without evidence of pneumothorax . The patient is status post median sternotomy and mitral valve repair . Curvilinear structure projecting over the left hilum has been present since at least ___ , unchanged . No new focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The cardiac silhouette remains enlarged . The aorta is calcified and tortuous .
    OUTPUT:
    
1 . No acute cardiopulmonary process . Persistent cardiac silhouette enlargement . Central dialysis catheter terminates in the right atrium .