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Topic: Computerized axial tomography

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Computed axial tomography

Brain imaging

Tomographic reconstruction

Allan McLeod Cormack

1979

	Computerized Axial Tomography
		Computerized axial tomography (CAT) is a diagnostic procedure that employs x rays in a unique manner.
		Tomography is a combination of tomo, from the Greek meaning "to cut," and graph, "to draw," a reference to the fact that the CAT scan image reveals a crosssection of the body or body part.
		Prior to the development of the CAT, x rays were done on the familiar table by a single x-ray tube that passed the rays through a given part of the body and exposed a plate of x-ray film.
	science.jrank.org /pages/1705/Computerized-Axial-Tomography.html (1281 words)

	Computerized Axial Tomography (CAT Scan)
		CAT scans are also used in the chest to identify tumors, cysts, or infections that may be suspected on a chest x-ray.
		CAT scans in this area are used to verify the presence or absence of tumors, infection, abnormal anatomy, or changes of the body from trauma.
		CAT scans have vastly improved the ability of doctors to diagnose many diseases earlier in their course and with much less risk than previous methods.
	www.becomehealthynow.com /article/diagradiology/639 (1369 words)

	CAT Scanner - History, Background, Design, Raw Materials, The Manufacturing, Quality Control
		The CAT scanner is made up of various complex electronic components, which are produced by various subcontractors and assembled into a complete unit by the scanner manufacturers.
		Tomography was developed to reduce this fuzziness and allow for the imaging of specific areas in the body.
		Unlike conventional tomography, the image produced by computerized transaxial tomography is a cross section of the body and is called a transaxial image because it is perpendicular to the body's long axis.
	www.madehow.com /Volume-3/CAT-Scanner.html (2349 words)

	Computed tomography - Wikipedia, the free encyclopedia
		The word "tomography" is derived from the Greek tomos (slice) and graphia (describing).
		Although historically (see below) 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.
		Axial images through the spine will only show one vertebral body at a time and cannot reliably show the intervertebral discs.
	en.wikipedia.org /wiki/Computed_axial_tomography (4351 words)

	CAT Scan (Computerized Axial Tomography or CT Scan) information produced by medical doctors
		CAT scans are performed to analyze the internal structures of various parts of the body.
		CAT scans of the abdomen are extremely helpful in defining body organ anatomy, including visualizing the liver, gallbladder, pancreas, spleen, aorta, kidneys, uterus, and ovaries.
		CAT scans in this area are used to verify the presence or absence of tumors, infection, abnormal anatomy, or changes of the body from trauma.
	www.medicinenet.com /CAT_Scan/article.htm (1006 words)

	Body Computed Tomography -- eCureMe.com
		The denser the tissue, and the higher the atomic number, the whiter the CAT image is. Bone and calcium appear white; air in the lungs appears fl; water, blood, and internal organs such as liver, kidneys, and intestines appear gray; and fat tissue appears dark gray.
		CAT scanning can be used to distinguish between benign and malignant tumors (cancer) in some cases.
		CAT scan can be used to detect internal hemorrhaging and injuries to the spleen, liver, kidneys, lungs, or other internal organs, as well as fractures, especially of the spine and small bones
	www.ecureme.com /emyhealth/data/Body_Computed_Tomography.asp (1061 words)

	Evaluation and Tests - Imaging - Computerized Axial Tomography Scan (CAT scan, CT scan)
		A CAT scan is an x-ray procedure that combines many x-ray images with the aid of a computer to generate cross-sectional views and, if needed, three-dimensional images of the internal organs and structures of the body.
		A CAT scan is not a test for peripheral neuropathy, but is performed to exclude other disorders that produce similar symptoms.
		Prior to a CAT scan, patients are often asked to avoid food, especially when contrast material is to be used.
	millercenter.uchicago.edu /learnaboutpn/evaluation/imaging/ctscan.shtml (256 words)

	G/U Imaging: CAT Scan (Site not responding. Last check: 2007-11-05)
		David A. Hatch, M.D. A computerized axial tomography scan is performed by obtaining axial x-rays images using computerized reconstruction.
		CAT scans can be enhanced by using intravenous iodinated contrast material.
		Although significant renal function is required to concentrate and excrete the contrast material, CAT scans are relatively sensitive in detecting and comparing renal function between two kidneys.
	www.meddean.luc.edu /lumen/MedEd/urology/cthome.htm (211 words)

	CAT Scan (Computerized Axial Tomography or CT Scan) information produced by medical doctors
		A CAT scan is used to define normal and abnormal structures in the body and/or assist in procedures by helping to accurately guide the placement of instruments or treatments.
		In fact, CAT scan methods can be used to accurately measure the density of bone in evaluating osteoporosis.
		CAT scans are also used in the chest to identify tumors, cysts, or infections that may be suspected on a chest x-ray.
	www.medicinenet.com /cat_scan/article.htm (1006 words)

	axial - Search Results - MSN Encarta
		Vertebrates have a more or less rigid group of structures composed of cartilage or bone or of a combination of these two connective tissues.
		Computed Tomography, also known as computed axial tomography, or CAT scan, medical technology that uses X rays and computers to produce...
		Advances in technology in the early 1970s allowed psychologists to see inside the living human brain for the first time without physically cutting...
	ca.encarta.msn.com /axial.html (142 words)

	Memory Loss & the Brain
		Tomography is a technique for constructing images of the structures at a particular depth within the body - as if through a "slice" at a particular level within the body.
		This is done by taking several x-ray images at different angles and then using a computer to analyze these images and produce a reconstruction that only includes structures visible at a certain level or "slice".
		An older term is computerized axial tomography (CAT), which refers to the fact that images were originally only taken in the axial plane; this is no longer the case.
	www.memorylossonline.com /glossary/computedtomography.html (356 words)

	CT Scans Provide Additional Information
		"CAT" scan stands for "Computerized Axial Tomography," a diagnostic procedure that uses special x-ray equipment to obtain cross-sectional pictures of the body.
		Tomography uses many small picture "slices" to create a complete three-dimensional image that will represent the inside of your chest.
		Nowadays, doctors shorten the abbreviation CAT scan to simply "CT scan." This is partly because CT scans do not only produce "axial" images, or images that are cross-sections of the body, but can also show length-wise slices, or slices on a diagonal.
	healthlink.mcw.edu /article/1031002641.html (525 words)

	computerized axial tomography - HighBeam Encyclopedia (Site not responding. Last check: 2007-11-05)
		COMPUTERIZED AXIAL TOMOGRAPHY [computerized axial tomography] see CAT scan.
		The evolution of PET-CT.(Directed Reading)(Positron emission tomography-computed tomography)
		Mediastinal staging of non-small cell lung carcinoma using computed and positron-emission tomography.
	www.encyclopedia.com /doc/1E1-x-e-computeriz.html (187 words)

	Computed tomography - Definition, Purpose, Precautions, Description, Preparation, Aftercare, Risks, Normal results, ...
		Computed tomography scanning, also called CT scan, CAT scan, or computerized axial tomography, is a diagnostic tool that provides views of internal body structures using x rays.
		Because the computerized image is sharp, focused, and three-dimensional, many structures can be better differentiated (visualized) when compared with standard x rays.
		Computerized axial tomography (CAT) scan of a human brain with Parkinson's disease showing atrophy.
	www.minddisorders.com /Br-Del/Computed-tomography.html (2111 words)

	Pseudo-subarachnoid hemorrhage of the head diagnosed by computerized axial tomography: a postmortem study of ten ...
		Pseudo-subarachnoid hemorrhage of the head diagnosed by computerized axial tomography: a postmortem study of ten medical examiner cases
		In this report, we describe ten cases of pseudo-subarachnoid hemorrhage on computer axial tomography (CT) scan of the head.
		A pseudo-subarachnoid hemorrhage is a false positive finding by CT of the head in which the scan is interpreted as being positive for a subarachnoid hemorrhage not substantiated by subsequent neuropathologic findings.
	www.astm.org /JOURNALS/FORENSIC/PAGES/3904.htm (380 words)

	CT - Computed Tomography Radiology-Info.org
		Computed tomography (CT), more commonly known as a CAT scan, obtains multiple graphical images of body parts from many different angles using special x-ray equipment.
		Computed Tomography (CT) is not a new field.
		It was first developed in 1967 by Godfrey Hounsfield, a British electronics engineer who connected x-ray sensors to a computer and worked out a mathematical equation to form images from the data obtained by the x-ray sensors.
	www.radiology-info.org /computed-tomography.html (218 words)

	Computerized Axial Tomography (CAT or CT Scan)
		The Cat Scan Department offers a GE Hi-Speed CT scanner capable of detecting a wide range of pathology throughout the body.
		The CAT Scanning Department is staffed by Radiologic Technologists (RT’s) that are registered by the American Registry of Radiologic Technologists, and licensed by the State of Maine.
		Gastroview is the oral contrast (or dye) that is used to highlight the stomach and intestines for abdomen CAT Scanning exams.
	www.stmarysmaine.com /other_health/diagnostics/cat_ct_scans.html (283 words)

	Highbeam Encyclopedia - Search Results for Axial (Site not responding. Last check: 2007-11-05)
		Axial ratio measurements of single circularly polarized antennas.
		Axial Biotech Announces $4.1 Million Series A Financing.
		Relationships between mobility of axial structures and physical performance.
	www.encyclopedia.com /SearchResults.aspx?Q=Axial (590 words)

	Computed Tomography, CT Scan - oncologychannel
		Computed tomography (CT) scan, also called computerized axial tomography (CAT) scan, is used to create cross-sectional images of structures in the body.
		Computed tomography is used to detect abnormalities such as blood clots, cysts, fractures, infections, and tumors in internal structures (e.g., bones, muscles, organs, soft tissue).
		Patients lie on a movable table, which is slipped into a doughnut-shaped computed tomography scanner.
	www.oncologychannel.com /diagnostictests/CTscan.shtml (732 words)

	Arch Intern Med -- Abstract: Considerations in diagnosing brain abscess with computerized axial tomography, April 1, ...
		Arch Intern Med -- Abstract: Considerations in diagnosing brain abscess with computerized axial tomography, April 1, 1978, Heath et al.
		Considerations in diagnosing brain abscess with computerized axial tomography
		Four studies with computerized axial tomography (CT scan) were performed in
	archinte.ama-assn.org /cgi/content/abstract/138/4/628 (132 words)

	CT Scan (Computerized Tomography)
		Images can be viewed individually or in rapid sequence, or reconstructed by the technologist as a three - dimensional model that can be manipulated and rotated to provide the physician with an optimal image for review.
		CT scan or computerized tomography scan was first invented by Godfrey Hounsfield in the early 1970's at the EMI Laboratories in England.
		It is also referred to as CAT scan (Computerized Axial Tomography).
	www.providence.org /alaska/imaging/ct.htm (844 words)

	CT Scan, Computed Tomography - Urologychannel
		Computed tomography (CT) scan, also called computerized axial tomography (CAT) scan, is used to create cross-sectional images of structures in the body.
		Computed tomography is used to detect abnormalities such as blood clots, cysts, fractures, infections, and tumors in internal structures (e.g., bones, muscles, organs, soft tissue).
		Before undergoing a CT scan, patients must remove all metallic materials (e.g., jewelry, clothing with snaps, zippers) and may be required to change into a hospital gown that will not interfere with the x-ray images.
	urologychannel.com /diagnostictests/CTscan.shtml (596 words)

	CT Scan - Computerized Tomography
		Computed tomography (CT) is a diagnostic procedure that uses special x-ray equipment (Read about "X-rays") to obtain cross-sectional pictures of the body.
		Electron-Beam Computed Tomography or EBCT is a faster form of x-ray imaging technology.
		A PET scan (Read about "PET - Positron Emission Tomography") creates colored pictures of chemical changes (metabolic activity) in tissues, while a CT scan obtains cross-sectional pictures of the body.
	www.stayinginshape.com /4unionhospital/libv/x01.shtml (863 words)

	Definition of computerized axial tomography - NCI Dictionary of Cancer Terms
		A series of detailed pictures of areas inside the body taken from different angles; the pictures are created by a computer linked to an x-ray machine.
		Also called CAT scan, computed tomography (CT scan), or computerized tomography.
		computerized tomography, conception, concurrent therapy, conditioned response, conditioned stimulus
	www.cancer.gov /Templates/db_alpha.aspx?CdrID=44235 (101 words)

	Computerized Axial Tomography as an Aid in Bite Mark Analysis: A Case Report
		Computerized Axial Tomography as an Aid in Bite Mark Analysis: A Case Report
		A case is presented to demonstrate the use of computerized axial tomography (CAT) to develop precise registration of incisal edges for comparison to bite marks.
		Emphasis is drawn to the availability of CAT Scanning equipment and the importance of understanding its use as an adjunct or alternative to already accepted methods of incisal registration.
	www.astm.org /JOURNALS/FORENSIC/PAGES/648.htm (214 words)

	Brain Computed Tomography -- eCureMe.com
		Computed tomography (or computerized axial tomography) is an examination that uses X-ray to obtain a cross-sectional image of the human body.
		When X-rays are irradiated on the human body, some of the rays are absorbed and some pass through the body to produce an image.
		You will be asked to lie down on the CAT table.
	www.ecureme.com /emyhealth/data/Brain_Computed_Tomography.asp (873 words)

	Whole-Body CT (Computerized Axial Tomography) Screening \| Treatment Options - BlueCross BlueShield of Tennessee (Site not responding. Last check: 2007-11-05)
		A computer is used to put the pictures together into detailed images of organs, bones, and other tissues.
		This procedure is also called CT scanning, computerized tomography, or computerized axial tomography (CAT).
		Currently some medical imaging facilities are promoting a new use of CT as a preventative healthcare measure for healthy individuals who have no symptoms or suspicion of disease.
	www.bcbst.com /health/TreatmentOptions/WHOLE_BODY_CT_SCREENING.sHTM (687 words)

	Anatomy Electives
		The particular topics to be covered will be arranged between the student and interest and needs.
		A two-week course for the senior student to expose him/her to the radiologic discipline of Computerized Axial Tomography and to reinforce the student's concept of Cross-Sectional Anatomy.
		A two-week laboratory and conference/lecture course designed to give the senior student a more in-depth exposure to the structural and functional anatomy of the upper and lower extremities.
	qcom.etsu.edu /srelect/anat.htm (339 words)

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