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Computed
tomography
By Ingunn merete børresen
sir godfrey hounsfield



• Brain CT 1972-73
• Whole body CT 1975
Ct scan: basic

• Also known as CT or CAT scan.
• Uses x-rays to make detailed pictures of
  the structure inside the body.
• During the scan you will lie on a table
  that is attached to the scanner.
• Large doughnut shaped machine
CT scan: Basic


• CT's primary benefit is the ability to
  separate anatomical structures at
  different depths within the body.
• A form of tomography can be
  performed by moving the X-ray source
  and detector during an exposure.
Ct scan: Basic

• Anatomy at the target level remains
  sharp, while structures at different
  levels are blurred.
• By varying the extent and path of
  motion, a variety of effects can be
  obtained, with variable depth of field
  and different degrees of blurring of 'out
  of plane' structures
Computed tomography scan is an useful machine
which can see diagnosis of the disease on the patient
where others examination still did not see clear.




 A patient is receiving a CT scan for cancer. Outside
 of the scanning room is an imagine computer that
 reveals a 3D image of the body’s inner area.




A patient is moving during the scan, so the picture gets blurring.
That is why you may be asked to hold your breath during the
scanning.
Any motion, whether breathing or body movements can lead to
artifacts on the image.
Benefits by using ct
           scan


•   It’s painless, noninvasive and accurate.

•   It’s fast and simple; e.g in emergency cases, they can reveal internal
    injuries and bleeding quickly enough to help save lives.

•   Less sensitive to patient, than MRI

•   After CT examination no radiation remains in patient’s body.
Risks by using ct scan



•   Always a slight chance to get cancer.

•   In general, CT scan is not recommended for pregnant women unless
    medically necessary because of potential risk to the baby.

•   There is a chance of allergic reaction to the dye.
Sources


•   http://www.webmd.com/a-to-z-guides/computed-tomography-ct-
    scan-of-the-body

•   http://www.cancer.gov/cancertopics/factsheet/detection/CT

•   http://www.radiologyinfo.org/en/info.cfm?pg=bodice

•   http://en.wikipedia.org/wiki/X-ray_computed_tomography

•   http://www.ndt-ed.org/EducationResources/CommunityCollege/
    Radiography/AdvancedTechniques/computedtomography.htm

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Ct final pp presentation

  • 2. sir godfrey hounsfield • Brain CT 1972-73 • Whole body CT 1975
  • 3. Ct scan: basic • Also known as CT or CAT scan. • Uses x-rays to make detailed pictures of the structure inside the body. • During the scan you will lie on a table that is attached to the scanner. • Large doughnut shaped machine
  • 4. CT scan: Basic • CT's primary benefit is the ability to separate anatomical structures at different depths within the body. • A form of tomography can be performed by moving the X-ray source and detector during an exposure.
  • 5. Ct scan: Basic • Anatomy at the target level remains sharp, while structures at different levels are blurred. • By varying the extent and path of motion, a variety of effects can be obtained, with variable depth of field and different degrees of blurring of 'out of plane' structures
  • 6. Computed tomography scan is an useful machine which can see diagnosis of the disease on the patient where others examination still did not see clear. A patient is receiving a CT scan for cancer. Outside of the scanning room is an imagine computer that reveals a 3D image of the body’s inner area. A patient is moving during the scan, so the picture gets blurring. That is why you may be asked to hold your breath during the scanning. Any motion, whether breathing or body movements can lead to artifacts on the image.
  • 7. Benefits by using ct scan • It’s painless, noninvasive and accurate. • It’s fast and simple; e.g in emergency cases, they can reveal internal injuries and bleeding quickly enough to help save lives. • Less sensitive to patient, than MRI • After CT examination no radiation remains in patient’s body.
  • 8. Risks by using ct scan • Always a slight chance to get cancer. • In general, CT scan is not recommended for pregnant women unless medically necessary because of potential risk to the baby. • There is a chance of allergic reaction to the dye.
  • 9. Sources • http://www.webmd.com/a-to-z-guides/computed-tomography-ct- scan-of-the-body • http://www.cancer.gov/cancertopics/factsheet/detection/CT • http://www.radiologyinfo.org/en/info.cfm?pg=bodice • http://en.wikipedia.org/wiki/X-ray_computed_tomography • http://www.ndt-ed.org/EducationResources/CommunityCollege/ Radiography/AdvancedTechniques/computedtomography.htm

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