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tomography
tomography The use of X-rays to photograph a selected plane of a human body with other planes eliminated. The CT (computerized tomography) scanner is a ring-shaped X-ray machine that rotates through 180° around the horizontal patient, making numerous X-ray measurements every few degrees. The vast amount of information acquired is built into a three-dimensional image of the tissues under examination by the scanner's own computer. The patient is exposed to a dose of X-rays only some 20% of that used in a normal diagnostic X-ray.
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"tomography." A Dictionary of Biology. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "tomography." A Dictionary of Biology. 2004. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O6-tomography.html "tomography." A Dictionary of Biology. 2004. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-tomography.html |
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tomography
tomography (tŏ-mog-răfi) n. the technique of rotating a radiation detector around the patient so that the image obtained gives additional three-dimensional information. In plain film tomography this produces an image of structures at a particular depth within the body, bringing them into sharp focus, while deliberately blurring structures above and below them. The visual record of this technique is called a tomogram. See also computerized tomography, positron emission tomography, SPECT scanning.
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"tomography." A Dictionary of Nursing. 2008. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "tomography." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O62-tomography.html "tomography." A Dictionary of Nursing. 2008. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-tomography.html |
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tomography
to·mog·ra·phy / təˈmägrəfē/ • n. a technique for displaying a representation of a cross section through a human body or other solid object using X-rays or ultrasound. DERIVATIVES: to·mo·graph·ic / ˌtōməˈgrafik/ adj. |
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"tomography." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "tomography." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O999-tomography.html "tomography." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-tomography.html |
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tomography
tomography Any technique by which details of a subsurface plane can be represented graphically. See SEISMIC TOMOGRAPHY.
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AILSA ALLABY and MICHAEL ALLABY. "tomography." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "tomography." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-tomography.html AILSA ALLABY and MICHAEL ALLABY. "tomography." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-tomography.html |
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tomography
tomography Technique of X-ray photography in which details of only a single slice or plane of body tissue are shown.
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"tomography." World Encyclopedia. 2005. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "tomography." World Encyclopedia. 2005. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O142-tomography.html "tomography." World Encyclopedia. 2005. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-tomography.html |
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