Cat scans wiki project
- 1. Computerized Axial Tomography (CAT) SCANS By Abby Jeffers And James Kloss
- 2. CAT scans menu • Before CAT scans • What CT scanners • Development of CAT look like scans • How do they work • Overview of CT scans • Benefits of CT scans • What CT scans for in • Risks of CT scans the body • Evolution of the CAT scan When you see this picture click on it to come back to the menu. Works Cited
- 3. Before CAT Scans The problems with x-rays: X-ray radiographs offer only a two- dimensional image In a radiograph, a 3-D mass becomes a 2-D image and it is hard to tell individual tissues apart It is difficult to determine which bones and tissues are overlying and which are underlying http://www.asnt.org/publications/mate rialseval/basics/may00basics/may00bas ics.htm
- 4. Development of CAT Scans • Godfrey Hounsfield and Allan Cormack are credited as the inventors of the CAT scan • Cormack developed the theoretical principals behind reconstructing 2-dimensional images into one 3-D image • Hounsfield was the designer and builder of the first CAT scan machines • (http://www.aps.org/publicati ons/apsnews/200411/history.c fm)
- 5. Overview of CAT Scans • CAT scans are noninvasive medical tests to help doctors diagnose patients and treat their medical conditions. • Uses X-rays and a computer to create images of the inside of the human body. • These scans can help doctors diagnose major medical problem and disease.
- 6. What do they scan for in the body • CAT scans internal organs, bones, soft tissue, and blood vessels. • CAT scans provide better clarity than X-rays and reveals more important details than X- rays too.
- 7. How do they work • In many ways CAT scans work very much like any other X-ray examination devices. • In conventional X-rays small burst of radiation are aimed a the body and shot through the body. • The result if a image that is recorded on photographic film or a special image recording plate.
- 8. How do they work 2 • Now CAT scans are very similar to X-rays because in a CAT scan there are numerous X-rays that rotate around A • 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. • At the same time the examination table that you are laying on moves in and out of the machine. • The movement of the table creates a spiral path for the X-ray beam to follow.
- 9. How do they work 3 • The CAT scan shoot X-ray beams at every angle for 360 ° around the body. • A special computer process this large amount of data and produces a 2-D cross section of the human body. • This technique is called Helical or Spiral CAT
- 10. Benefits of CAT scan • It is painless, noninvasive, and very accurate. • CAT scans can provide information on bone, soft tissue, and blood vessels all at the same time. • Fast and simple • Provides real time imaging • No radiation remains in patients body after CAT scan.
- 11. Risks of CAT scans • Slight chance of cancer from excessive exposure to radiation. • Pregnant women should not use CAT scans unless needed to because of the potential risk to the baby. • Children should not have too many CAT scans because they are more sensitive to radiation.
- 12. What they look like • CAT scans are typically a large box like machine with a hole or a short tunnel in the center. • There is a examination table that slides into and out of the tunnel. • The computer workstation the process information from the scan is located in a separate room.
- 13. Evolution of the CAT scan • First-generation CAT • Today, fifth-generation scanners had one x-ray scanners have detectors source and one and x-ray tubes that are detector, which rotated switched on one at a around the patient time all around the patient.
- 14. Works Cited • http://www.asnt.org/publications/materialsev al/basics/may00basics/may00basics.htm • http://www.aps.org/publications/apsnews/20 0411/history.cfm • http://www.radiologyinfo.org/en/info.cfm?pg =bodyct#part_one • http://www.mayfieldclinic.com/pe-ct.htm