Computerized Axial   Tomography   (CAT) SCANS   By Abby Jeffers  And  James Kloss
Before CAT Scans  <ul><li>The problems with x-rays: </li></ul><ul><li>X-ray radiographs offer only a two-dimensional image...
Development of CAT Scans  <ul><li>Godfrey Hounsfield and Allan Cormack are credited as the inventors of the CAT scan </li>...
Evolution of the CAT scan  <ul><li>First-generation CAT scanners had one x-ray source and one detector, which rotated arou...
Overview of CAT Scans <ul><li>CAT scans are noninvasive medical tests to help doctors diagnose patients and treat their me...
What do they scan for in the body <ul><li>CAT scans internal organs, bones, soft tissue, and blood vessels.  </li></ul><ul...
How do they work <ul><li>In many ways CAT scans work very much like any other X-ray examination devices.  </li></ul><ul><l...
How do they work 2  <ul><li>Now CAT scans are very similar to X-rays because in a CAT scan there are numerous X-rays that ...
How do they work 3 <ul><li>The CAT scan shoot X-ray beams at every angle for 360 ° around the body.  </li></ul><ul><li>A s...
Benefits of CAT scan <ul><li>It is painless, noninvasive, and very accurate. </li></ul><ul><li>CAT scans can provide infor...
Risks of CAT scans  <ul><li>Slight chance of cancer from excessive exposure to radiation.  </li></ul><ul><li>Pregnant wome...
What they look like <ul><li>CAT scans are typically a large box like machine with a hole or a short tunnel in the center. ...
Works Cited  <ul><li>http://www.asnt.org/publications/materialseval/basics/may00basics/may00basics.htm </li></ul><ul><li>h...
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CAT scans 2

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CAT scans 2

  1. 1. Computerized Axial Tomography (CAT) SCANS By Abby Jeffers And James Kloss
  2. 2. Before CAT Scans <ul><li>The problems with x-rays: </li></ul><ul><li>X-ray radiographs offer only a two-dimensional image </li></ul><ul><li>In a radiograph, a 3-D mass becomes a 2-D image and it is hard to tell individual tissues apart </li></ul><ul><li>It is difficult to determine which bones and tissues are overlying and which are underlying http://www.asnt.org/publications/materialseval/basics/may00basics/may00basics.htm </li></ul>
  3. 3. Development of CAT Scans <ul><li>Godfrey Hounsfield and Allan Cormack are credited as the inventors of the CAT scan </li></ul><ul><li>Cormack developed the theoretical principals behind reconstructing 2-dimensional images into one 3-D image </li></ul><ul><li>Hounsfield was the designer and builder of the first CAT scan machines </li></ul><ul><li>( http://www.aps.org/publications/apsnews/200411/history.cfm ) </li></ul>
  4. 4. Evolution of the CAT scan <ul><li>First-generation CAT scanners had one x-ray source and one detector, which rotated around the patient </li></ul><ul><li>Today, fifth-generation scanners have detectors and x-ray tubes that are switched on one at a time all around the patient. </li></ul>
  5. 5. Overview of CAT Scans <ul><li>CAT scans are noninvasive medical tests to help doctors diagnose patients and treat their medical conditions. </li></ul><ul><li>Uses X-rays and a computer to create images of the inside of the human body. </li></ul><ul><li>These scans can help doctors diagnose major medical problem and disease. </li></ul>
  6. 6. What do they scan for in the body <ul><li>CAT scans internal organs, bones, soft tissue, and blood vessels. </li></ul><ul><li>CAT scans provide better clarity than X-rays and reveals more important details than X-rays too. </li></ul>
  7. 7. How do they work <ul><li>In many ways CAT scans work very much like any other X-ray examination devices. </li></ul><ul><li>In conventional X-rays small burst of radiation are aimed a the body and shot through the body. </li></ul><ul><li>The result if a image that is recorded on photographic film or a special image recording plate. </li></ul>
  8. 8. How do they work 2 <ul><li>Now CAT scans are very similar to X-rays because in a CAT scan there are numerous X-rays that rotate around A </li></ul><ul><li>At the same time the X-rays are shooting beams of radiation that is being received by X-ray detectors on the opposite side of the patient. </li></ul><ul><li>At the same time the examination table that you are laying on moves in and out of the machine. </li></ul><ul><li>The movement of the table creates a spiral path for the X-ray beam to follow. </li></ul>
  9. 9. How do they work 3 <ul><li>The CAT scan shoot X-ray beams at every angle for 360 ° around the body. </li></ul><ul><li>A special computer process this large amount of data and produces a 2-D cross section of the human body. </li></ul><ul><li>This technique is called Helical or Spiral CAT </li></ul>
  10. 10. Benefits of CAT scan <ul><li>It is painless, noninvasive, and very accurate. </li></ul><ul><li>CAT scans can provide information on bone, soft tissue, and blood vessels all at the same time. </li></ul><ul><li>Fast and simple </li></ul><ul><li>Provides real time imaging </li></ul><ul><li>No radiation remains in patients body after CAT scan. </li></ul>
  11. 11. Risks of CAT scans <ul><li>Slight chance of cancer from excessive exposure to radiation. </li></ul><ul><li>Pregnant women should not use CAT scans unless needed to because of the potential risk to the baby. </li></ul><ul><li>Children should not have too many CAT scans because they are more sensitive to radiation. </li></ul>
  12. 12. What they look like <ul><li>CAT scans are typically a large box like machine with a hole or a short tunnel in the center. </li></ul><ul><li>There is a examination table that slides into and out of the tunnel. </li></ul><ul><li>The computer workstation the process information from the scan is located in a separate room. </li></ul>
  13. 13. Works Cited <ul><li>http://www.asnt.org/publications/materialseval/basics/may00basics/may00basics.htm </li></ul><ul><li>http://www.aps.org/publications/apsnews/200411/history.cfm </li></ul><ul><li>http://www.radiologyinfo.org/en/info.cfm?pg=bodyct#part_one </li></ul><ul><li>http://www.mayfieldclinic.com/pe-ct.htm </li></ul>
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