Why do you have to drink water before a CT scan?

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  1. #contrast
  2. #drink
  3. #prior
  4. #bladder
  5. #hydrates
  6. #appointment
  7. #coffee
  8. #helps
  9. #before
  10. #usually
  11. #asked
  12. #water
  13. #hours
  14. #media
  15. #having
  16. #during
  17. #shows
  18. #500ml