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27 Cards in this Set
- Front
- Back
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In 1917 who correctly theorized that a sufficient number of mathematic projections, properly manipulated, would produce an image of the represented object?
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Johann Radon
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What was the significance of Radon's mathematic image of a gravity well?
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It represents the first example of producing a polar, back projected image by computation.
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W.H. Olendorf constructed the first prototype reconstruction tomography scanner in what year?
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1961
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In 1963 who proposed reconstruction and tomographic approaches to nuclear medicine.... concepts today that are represented by the spect camera.
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David E. Kuhl and Roy Q. Edwards
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Allen Cormack published a series of mathematic equations which he had developed, refining the Radon Transform method for work in radiotherapy treatment in what year?
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1963 and 1964
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Who shared the nobel prize in medicine and physiology for their work on the CT scanner and reconstruction methods?
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Allan Cormack and Houndsfield
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Why was Allen Cormacks findings so significant in CT?
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These equations were the heart of CT computer algorithms, as later developed.
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Houndsfields first prototype device took how long to scan and process and collected how much data?
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9 days, 2.5 hours, 28,000 data points.
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How was the time great reduced?
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An x-ray machine replaced the gamma source, the imaging time was reduced to one day
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When did the first CT clinical prototype start working?
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1971
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Describe the first clinical prototype of CT?
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It used an x-ray source and single sodium Iodide photomultiplier scintillation detector rotating through 180 degree, obtainin a view or projection every 1 degree of arc, producing a total of 43,200 meausrements.
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How was the EMI mark I improved later?
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scanning time went from 20 minutes to 4.5 minutes, and the matrix went from 80 X 80 to 160 X 160
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In 1972 what was demonstrated in the first living patient to be scanned?
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Brain Tumor
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Who developed the first whole body CT scanner? What was the name of it? And when was the first one installed?
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R.S. Ledley, ACTA scanner, 1973
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Who developed the second generation scanner?
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Ohio Nuclear
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Who developed the first 3rd generation scanner? In what year?
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General Electric, 1974
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Who developed the design for the first fourth generation scanner? In what year?
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American Science and Engineering, 1975
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In what year did Cormack and Hounsfield shared the Nobel Prize for Medicine for their contributions to CT?
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1979
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In what year was houndsfield knighted for his contributions to medicine?
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1981
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Who demonstrated that CT actually delivers a greater dosage than conventional radiography? In what year?
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Euclid Seeram, 1982
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What part of x-ray tube technology has advanced rapidly because of CT?
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Anode Heat Storage Capacity
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When did slip rings for CT scanners occur?
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mid 1980's
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When was the 5th generation CT scanner developed?Who developed and designed it? What is it called and primarily used for?
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1983, Douglas Boyd, Electron Beam CT scanner, Used primarily for coronary and cardiac studies.
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Who modified a siemens third generation scanner to perform helical, and in what year?
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Dr. Willi Kalender, 1988
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3rd generation scanners with a slip ring are really what generation?
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6th generation
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Who developed the CT Twin and in what time range?
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Elsinct, late eighties and early nineties.
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Who bought the CT twin and in what year? Who bought that company?
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Marconi also known as picker, MX800, Phillips then bought them and continued to produce the MX 8000
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