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Computed Tomography

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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  1. Computed Tomography By Timothy Lindis

  2. History of CT • Invented 1972 • British Engineer Godfrey Hounsfield and Allan Cormack • Hounsfield awarded Nobel prize • Hounsfield also knighted in Britain

  3. 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

  4. 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

  5. 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

  6. 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

  7. Cont • Image is then processed and put onto computer • Image can be moved around • Can zoom in and out

  8. Typically Scanned Body Parts • Brain • Heart and blood vessels • Head and face including sinuses • Chest, stomach, and pelvic area • Spine, bones and joints

  9. What is looked for in CT scans • Cancer • Abnormalities • Problems with organs • Brain damage

  10. 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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