Related topics: radiation
Computed tomography
hideComputed tomography (CT) is a medical imaging method employing tomography. Digital geometry processing is used to generate a three-dimensional image of the inside of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. The word "tomography" is derived from the Greek tomos (slice) and graphein (to write). Computed tomography was originally known as the "EMI scan" as it was developed at a research branch of EMI, a company best known today for its music and recording business. It was later known as computed axial tomography (CAT or CT scan) and body section röntgenography.
CT produces a volume of data which can be manipulated, through a process known as "windowing", in order to demonstrate various bodily structures based on their ability to block the X-ray/Röntgen beam. Although historically the images generated were in the axial or transverse plane, orthogonal to the long axis of the body, modern scanners allow this volume of data to be reformatted in various planes or even as volumetric (3D) representations of structures. Although most common in medicine, CT is also used in other fields, such as nondestructive materials testing. Another example is the DigiMorph project at the University of Texas at Austin which uses a CT scanner to study biological and paleontological specimens.
For more information about Computed tomography, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with ct scan
Studies quantify radiation doses, cancer risks from CT scans
Dec 15, 2009 |
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Doses of radiation from commonly performed computed tomography (CT) scans vary widely, appear higher than generally believed and may contribute to an estimated tens of thousands of future cancer cases, according to two reports ...
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Physicists see through the opaque with 'T-rays'
4 hours ago |
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"T-rays" may make X-rays obsolete as a means of detecting bombs on terrorists or illegal drugs on traffickers, among other uses, contends a Texas A&M physicist who is helping lay the theoretical groundwork to make the concept ...
French court orders Google to stop scanning French books
5 hours ago |
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A French court on Friday told Google that it cannot digitise French books without publishers' approval and ordered the online giant to pay 300,000 euros (430,000 dollars) in damages.
French technology upstart challenges Google
19 hours ago |
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(AP) -- France's efforts to digitize its culture, from Marcel Proust's manuscripts to the first films of the legendary Lumiere brothers, long have been bogged down by the country's reluctance to rely on help from American ...
Researcher studies the universe through quantum electrodynamics
22 hours ago |
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(PhysOrg.com) -- Fundamental constants, such as the standards for length and mass, are a given in our society. However, research has shown that these constants might be changing slightly with the expansion of the universe.
Researchers identify possible imaging method to stratify breast cancer without biopsy
Dec 17, 2009 |
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Scientists from the Kimmel Cancer Center at Jefferson have discovered a possible way for malignant breast tumors to be identified, without the need for a biopsy. The findings were published online ahead of print in the Journal of ...
TGen analysis identifies biomarkers for diabetic kidney failure
Dec 16, 2009 |
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Researchers using a DNA analysis tool developed by the Translational Genomics Research Institute (TGen) and UCLA have identified genetic markers that could help treat chronic kidney disease among diabetics.
Global barcode project to scan plants in the wild
Dec 16, 2009 |
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(PhysOrg.com) -- A cheap and fast method of identifying the world's most important plants in the wild could soon be possible, thanks to a global project involving the University of Adelaide.
Researchers reveal ancient origins of modern opossum
Other Sciences / Archaeology & Fossils
Dec 16, 2009 |
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A University of Florida researcher has co-authored a study tracing the evolution of the modern opossum back to the extinction of the dinosaurs and finding evidence to support North America as the center of ...
CERN Colour X-ray Technology Set to Save Lives
Dec 15, 2009 |
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(PhysOrg.com) -- Medical studies are soon to start with the MARS scanner, a revolutionary CT scanner developed by the University of Canterbury, New Zealand. The scanner, which incorporates technology developed at the world's ...
Cold war - Fighting the threat of latent TB (w/ Podcast)
Dec 15, 2009 |
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(PhysOrg.com) -- Scientists are making breakthroughs in studying the latent form of Mycobacterium tuberculosis. This work could revolutionise the treatment of TB.
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