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• X-ray_computed_tomography abstract "X-ray computed tomography (x-ray CT) is a technology that uses computer-processed x-rays to produce tomographic images (virtual 'slices') of specific areas of the scanned object, allowing the user to see what is inside it without cutting it open. Digital geometry processing is used to generate a three-dimensional image of the inside of an object from a large series of two-dimensional radiographic images taken around a single axis of rotation. Medical imaging is the most common application of x-ray CT. Its cross-sectional images are used for diagnostic and therapeutic purposes in various medical disciplines. The rest of this article discusses medical-imaging x-ray CT; industrial applications of x-ray CT are discussed at industrial computed tomography scanning.As x-ray CT is the most common form of CT in medicine and various other contexts, the term computed tomography alone (or CT) is often used to refer to x-ray CT, although other types exist (such as positron emission tomography [PET] and single-photon emission computed tomography [SPECT]). Older and less preferred terms that also refer to x-ray CT are computed axial tomography (CAT scan) and computer-assisted tomography. X-ray CT is a form of radiography, although the word "radiography" used alone usually refers, by wide convention, to non-tomographic radiography.CT produces a volume of data that can be manipulated in order to demonstrate various bodily structures based on their ability to block the x-ray beam. Although, historically, the images generated were in the axial or transverse plane, perpendicular 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 archaeological uses such as imaging the contents of sarcophagi. Individuals responsible for performing CT exams are called radiologic technologists or radiographers and are required to be licensed in most states of the USA.Usage of CT has increased dramatically over the last two decades in many countries. An estimated 72 million scans were performed in the United States in 2007. One study estimated that as many as 0.4% of current cancers in the United States are due to CTs performed in the past and that this may increase to as high as 1.5 to 2% with 2007 rates of CT usage; however, this estimate is disputed., as there is not a scientific consensus about the existence of damage from low-levels of radiation. Kidney problems following intravenous contrast agents may also be a concern in some types of studies.".
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• X-ray_computed_tomography caption "A patient is receiving a CT scan for cancer. Outside of the scanning room is an imaging computer that reveals a 2D image of the body's interior.".
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• X-ray_computed_tomography icd "B?2".
• X-ray_computed_tomography label "Computed tomography".
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• X-ray_computed_tomography name "X-ray computed tomography".
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• X-ray_computed_tomography others "no".
• X-ray_computed_tomography subject Category:1972_introductions.
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• X-ray_computed_tomography comment "X-ray computed tomography (x-ray CT) is a technology that uses computer-processed x-rays to produce tomographic images (virtual 'slices') of specific areas of the scanned object, allowing the user to see what is inside it without cutting it open. Digital geometry processing is used to generate a three-dimensional image of the inside of an object from a large series of two-dimensional radiographic images taken around a single axis of rotation.".
• X-ray_computed_tomography label "Computertomografie".
• X-ray_computed_tomography label "Computertomographie".
• X-ray_computed_tomography label "Tomodensitométrie".
• X-ray_computed_tomography label "Tomografia computadorizada".
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• X-ray_computed_tomography label "Tomografia komputerowa".
• X-ray_computed_tomography label "Tomografía axial computarizada".
• X-ray_computed_tomography label "X-ray computed tomography".
• X-ray_computed_tomography label "X射线计算机断层成像".
• X-ray_computed_tomography label "Компьютерная томография".
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