Unit 8 medical physics

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Unit 8 medical physics
2014-05-12 08:12:19
rays Catscans
X-rays,CAT scans
X-ray and CAT scans
Show Answers:

  1. What are X-rays?
    high frequency electromagnetic waves
  2. What are the advantages of X-rays?
    • quick
    • cheap
    • readily available
    • well defined contrast images
    • proven track record
  3. What are the disadvantages of x-rays?
    • Poor imaging on soft tissue (x-rays penetrate through the soft tissue)
    • ionising radiation
    • protection needed
  4. What is stochastic and somatic damage?
    • Stochastic Damage; It depends on the dose of radiation received. (usually causes cancer)
    • Somatic damage; can not be inherited, it is only the person being treated in which is at risk of the damage. It does not effect the reproductive cells.
  5. what is hereditary damage?
    Effects of their reproductive tissues, in which effects their offspring.
  6. What safety precautions are taken for the radiographer and the patient when having x-rays?
    lead apron for the patient to wear to protect the parts of the body that doesn't need x-rays.

    the radiographer will stand behind a lead screen, and wear a monitor for the amount of x-rays he/she is exposed too.
  7. what are the uses of x-rays?
    • bone fractures
    • teeth scans
    • breast cancer
  8. What are CAT scans?
    X-rays are rotated around the body to produce cross-sectional images which can be put together to create a 3D image of the body.
  9. What are the advantages of CAT scans?
    • 3D image
    • quick
  10. what are the disadvantages of CAT scans?
    • ionising radiation
    • high dose of radiation
    • fewer cat scans available
    • long waiting lists