Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left port tip is seen in the right atrium / cavoatrial junction , unchanged in position since prior examination . The lungs are clear . There is no pleural effusion or pneumothorax . The heart size , mediastinal contour , and hila are unremarkable .
    OUTPUT:
    
No acute intra thoracic process .