Computed Tomography (CT Scan) - PowerPoint PPT Presentation

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Computed Tomography (CT Scan)

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Computed Tomography (CT Scan) By: George Douleh History CT was invented by Godfrey Hounsfield, a British Engineer and Allan Comrack, a South African physicist, in 1972. – PowerPoint PPT presentation

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Title: Computed Tomography (CT Scan)


1
Computed Tomography(CT Scan)
  • By George Douleh

2
History
  • CT was invented by Godfrey Hounsfield, a British
    Engineer and Allan Comrack, a South African
    physicist, in 1972.
  • Awarded the Nobel Prize for contributions to
    medicine and science in 1979.
  • First CT scanners available in 1976, originally
    dedicated to head imaging only.
  • Became widely available by 1980.
  • However took days to construct a single image.

3
History
4
Current Technology
  • Roughly 6,000 CT Scanners in the U.S
  • And about 30,000 worldwide.
  • Therefore have become much less costly.
  • 2,000-3,000 to get a CT Scan
  • A 512 x 512 inch image can now be constructed in
    less than a second.
  • Images are now much more detailed.

5
Current Technology
6
Procedure
  • Many x-ray beams and a set of x-ray detectors
    rotate around the body, measuring the amount of
    radiation absorbed by your body.
  • The examination table is at the same time moving
    through the scanner, so it follows a spiral path.
  • A special computer processes the data and created
    a 2 dimensional cross sectional image of your
    body.
  • Displayed on the monitor.
  • Procedure usually takes about 30 minutes

7
Uses of CT Scans
  • CT Scans are used to view
  • Internal organs
  • Bone
  • Soft tissue
  • Blood vessels

8
Pros
  • Painless and accurate
  • Can image bone, soft tissue, and blood vessel at
    the same time
  • Can be used even if you have an implanted device.
  • Fast and simple reveal internal injuries quickly
    enough to save lives!

9
Cons
  • Radiation exposure
  • Very slight chance of obtaining cancer
  • Very time consuming
  • patient must remain motionless for roughly 30
    minutes

10
Limitations
  • Soft tissue near the brain, internal pelvis
    organs, knee or shoulder can be seen more clearly
    with MRI
  • The moving table weight limit is about 450 pounds
  • Radiation exposure limits amount of CT Scans you
    can receive.
  • Claustrophobia

11
Future
  • Multi-Sensor CT Scan
  • shorter exam times
  • Decreased X-Ray exposure
  • Even faster results
  • More detail

12
Works Cited
  • "Brief History of CT CT Scan." Imaginis. Web.
    22 Apr. 2011. lthttp//www.imaginis.com/ct-scan/b
    rief-history-of-ctgt.
  • "CAT Scan (CT) - Body." RadiologyInfo - The
    Radiology Information Resource for Patients. Web.
    22 Apr. 2011. lthttp//radiologyinfo.org/en/info.cf
    m?pgbodyctgt.
  • "CT Scan - Tests, Test Results Diagnosis - NY
    Times Health Information." Health News - The New
    York Times. Web. 22 Apr. 2011. lthttp//health.nyti
    mes.com/health/guides/test/ct-scan/overview.htmlgt.
  • Davis, Lawrence M. "CT Scan." EMedicineHealth.
    Web. 23 Apr. 2011. lthttp//www.emedicinehealth.com
    /ct_scan/article_em.htmgt.
  • Saxena, Rajeev. "CT Scan Machine Gives Radiation
    Overdoses At Cedar Sinai Hospital Trends
    Updates." Trends Updates - Gadgets, Fashion,
    Automobile, Environment. Web. 24 Apr. 2011.
    lthttp//trendsupdates.com/ct-scan-machine-gives-ra
    diation-overdoses-at-cedar-sinai-hospital/gt.
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