Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath tip terminates in the mid SVC . Heart size is normal . Mediastinal contour is unchanged . Relatively symmetric paramediastinal opacities likely reflect post radiation changes . Pulmonary vasculature is not engorged . Retrocardiac opacity may reflect atelectasis or infection . There is no pleural effusion or pneumothorax . Clips are seen in the right neck . Mild degenerative changes are present in the thoracic spine .
    OUTPUT:
    
1 . Retrocardiac opacity may reflect atelectasis or infection . 2 . Paramediastinal symmetric opacities likely due to post radiation changes . 3 . Left - sided Port - A - Cath tip in the mid SVC .