Computed tomography
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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

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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


Computed tomography

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


Computed tomography

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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