Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a central catheter with the tip within the right atrium . Also noted is a loop within the distal catheter . The cardiomediastinal silhouette is normal . The lungs are clear and there is no pleural effusion or pneumothorax .
    OUTPUT:
    
Central catheter tip within the right atrium . If desired , the catheter can be pulled back 4 cm to place the tip within the low SVC . Also noted is a loop within the distal catheter .