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Computed Tomography. By Timothy Lindis. History of CT. Invented 1972 British Engineer Godfrey Hounsfield and Allan Cormack Hounsfield awarded Nobel prize Hounsfield also knighted in Britain. Cont. 1 st model dedicated to heads only 1974 first machines put into use

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computed tomography

Computed Tomography

By Timothy Lindis

history of ct
History of CT
  • Invented 1972
  • British Engineer Godfrey Hounsfield and Allan Cormack
  • Hounsfield awarded Nobel prize
  • Hounsfield also knighted in Britain
slide3
Cont.
  • 1st model dedicated to heads only
  • 1974 first machines put into use
  • 1976 whole body scans put into use
  • Widely available in 1980
  • 30,000 now installed worldwide
how the first ct scanner worked
How the First CT Scanner Worked
  • Person sat down in chair and head placed in machine
  • Radiation to head
  • Several hours to acquire data
  • Two days to reconstruct image
  • Improved greatly over the years
  • Whole process takes only 5-10 seconds now
x ray vs ct scan
X-ray vs CT Scan
  • X-Ray is 2D picture
  • CT Scan is a 3D image
  • Can view hole picture of organ
  • Can examine organ slice by slice
how a ct scan works
How a CT Scan Works
  • Person lays down on table
  • Table gets put through machine “donut”
  • X-rays circle the body
  • The X-rays bounce back to a scanner
  • Scanner begins to develop an image
slide7
Cont
  • Image is then processed and put onto computer
  • Image can be moved around
  • Can zoom in and out
typically scanned body parts
Typically Scanned Body Parts
  • Brain
  • Heart and blood vessels
  • Head and face including sinuses
  • Chest, stomach, and pelvic area
  • Spine, bones and joints
what is looked for in ct scans
What is looked for in CT scans
  • Cancer
  • Abnormalities
  • Problems with organs
  • Brain damage
bibliography
Bibliography
  • http://www.floridahospitalradiology.com/services/ct-scan/overview
  • http://www.avmi.net/newfiles/CT/CT.html
  • http://www.fda.gov/radiation-emittingproducts/radiationemittingproductsandprocedures/medicalimaging/medicalx-rays/ucm115318.htm
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