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Topic: Computed tomography

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	Medical Imaging - About Medical Imaging: Glossary of Medical Imaging Technologies
		Visual examination of the inner surface of the colon by means of an instrument for the examination of the interior of the colon – the division of the large intestine extending from the first part of the large intestine to the rectum.
		Positron emission tomography, also called PET or a PET scan, is a diagnostic examination that involves the development of biologic images based on the detection of subatomic particles.
		Computer calculation of the distance to the sound-reflecting or absorbing surface plus the known orientation of the sound beam gives a two- or three-dimensional image.
	medicalimaging.org /about/glossary.cfm (1880 words)

	Computed tomography - Medgadget Wiki
		Computed tomography (CT), originally known as computed axial tomography (CAT) and body section roentgenography, is a medical imaging method employing tomography where digital geometry processing is used to generate a three-dimensional image of the internals of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation.
		Newer machines with faster computer systems and newer software strategies can process not only individual cross sections but continuously changing cross sections as the gantry, with the object to be imaged, is slowly and smoothly slid through the X-ray circle.
		Their computer systems integrate the data of the moving individual slices to generate three dimensional volumetric information (3D-CT scan), in turn viewable from multiple different perspectives on attached CT workstation monitors.
	www.medgadget.com /wiki/wiki/Computed_tomography (2939 words)

	Computed Tomography (CT): Questions and Answers - National Cancer Institute
		Computed tomography (CT) is a diagnostic procedure that uses special x-ray equipment to obtain cross-sectional pictures of the body (see Question 1).
		Computed tomography (CT) is a diagnostic procedure that uses special x-ray equipment to obtain cross-sectional pictures of the body.
		One type of virtual endoscopy, known as CT colonography or virtual colonoscopy, is under study as a screening technique for colon cancer.
	www.cancer.gov /cancertopics/factsheet/Detection/CT (1043 words)

	AVMI - Computed Tomography (Site not responding. Last check: 2007-10-19)
		Computed Tomography (CT) imaging is also known as "CAT scanning" (Computed Axial Tomography).
		Tomography is from the Greek word "tomos" meaning "slice" or "section" and graphia meaning "describing".
		Computed Tomography is based on the x-ray principal: as x-rays pass through the body they are absorbed or attenuated (weakened) at differing levels creating a matrix or profile of x-ray beams of different strength.
	www.avmi.net /NewFiles/CT/CT.html (1142 words)

	Computed tomography in clinical practice -- Garvey and Hanlon 324 (7345): 1077 -- BMJ
		Computed tomography was first introduced 30 years ago and has since become an integral part of clinical practice.
		Computed tomographic colonography (virtual colonoscopy) was first introduced in the mid-1990s as a non-invasive technique to image the colon.
		Computed tomographic angiography: historical perspective and new state of the art using multi detector row helical computed tomography.
	www.bmj.com /cgi/content/full/324/7345/1077 (2264 words)

	CTSim: The Computed Tomography Simulator
		Computed Tomography is the technique of estimating the interior of objects from the measurements of radiation projected through the object.
		Computed Tomography is an extremely imporant imaging technique in modern medicine.
		This podcast discusses cutting edge research in CT scanning (computed tomography) and is aimed at radiologists,...
	www.ctsim.org (501 words)

	[No title] (Site not responding. Last check: 2007-10-19)
		A CT or CAT scan is a diagnostic imaging procedure that uses a combination of x-rays and computer technology to produce cross-sectional images (often called slices), both horizontally and vertically, of the body.
		In computed tomography, the x-ray beam moves in a circle around the body.
		The x-ray information is sent to a computer that interprets the x-ray data and displays it in 2-dimensional form on a monitor.
	www.ecommunity.com /health/index.aspx?pageid=P01277 (922 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)

	Procedures: Diagnosis of Brain, Spinal Cord, and Nerve Disorders: Merck Manual Home Edition
		Computed tomography (CT) is a computer-enhanced scanning technique for analyzing a series of x-rays taken from different angles.
		In positron emission tomography (PET), a substance necessary for brain function (such as oxygen or sugar) is labeled with a radioactive molecule (radionuclide) that gives off positively charged signals (positrons) for a very short time.
		Single photon emission computed tomography (SPECT) uses radionuclides to produce images of blood flow to the brain.
	www.merck.com /mmhe/sec06/ch077/ch077d.html (2897 words)

	Computed Tomography to Detect Coronary Artery Calcification
		This policy addresses the use of electron beam computed tomography (EBCT) for two main indications, namely, as a screening technique for coronary artery disease (CAD) in asymptomatic individuals or for evaluating the necessity of angiography in symptomatic patients.
		Computed tomography, heart, without contrast material followed by contrast material(s) and further sections, including cardiac gating and 3D image post processing; cardiac structure and morphology, with quantitative evaluation of coronary calcium
		Computed tomography, heart, without contrast material followed by contrast material(s) and further sections, including cardiac gating and 3D image post processing; cardiac structure and morphology and computed tomographic angiography of coronary arteries (including native and anomalous coronary arteries, coronary bypass grafts), with quantitative evaluation of coronary calcium
	www.regence.com /trgmedpol/radiology/rad06.html (2060 words)

	Computed Tomography
		Computed Tomography is a specialized X-ray imaging technique.
		CT creates the image by using an array of individual small X-Ray sensors and a computer.
		A computer then processes this information to create an image on the video screen.
	rad.usuhs.mil /rad/home/comptom.html (139 words)

	Computed tomography, CT Scan - Oncology Channel
		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 (598 words)

	Poughkeepsie New York-DRA Imaging, PC-Diagnostic and Interventional Radiology - Computed Tomography
		Multislice Computed Tomography is a sophisticated x-ray imaging technique that lets physicians look at anatomy deep inside your body.
		Acquiring up to sixteen slices simultaneously allows studies to be done faster, with higher resolution, better detail and increased computer manipulation capabilities -- all of which contribute to enhanced diagnostic skills.
		At DRA Imaging, P.C., Computed Tomography Technologists certified by the ARRT (American Registry of Radiological Technologists) perform all exams.
	www.draimaging.com /computed-tomography.htm (357 words)

	Spiral computed tomography of pulmonary embolism -- Herold 19 (35 Supplement): 13S -- European Respiratory Journal
		The lung window settings of this computed tomography angiogram in a 54-yr-old male with PE in the left lower lobe shows a pleural based density with a convex margin pointing towards the hilum.
		8.— Computed tomography (CT) diagnosis of venous thrombosis.
		Spiral computed tomography is comparable to angiography the diagnosis of pulmonary embolism.
	erj.ersjournals.com /cgi/content/full/19/35_suppl/13S (5035 words)

	Computed Tomography
		CANCER FACTS National Cancer Institute National Institutes of Health Computed tomography is a diagnostic procedure in which cross-sectional pictures or "tomographic slices" of the body are made by x-ray.
		The final image, called a "computed tomogram" or "CT slice," is displayed on a cathode-ray tube (CRT), a device similar to a television picture tube and screen.
		Computed tomography offers some advantages over other x-ray techniques in diagnosing disease, particularly because it clearly shows the shape and exact location of organs, soft tissues, and bones in any "slice" of the body.
	cancerweb.ncl.ac.uk /cancernet/600052.html (690 words)

	Society of Cardiovascular Computed Tomography (SCCT) - Welcome
		Computed Tomography of the heart and cardiovascular system continues to show an impressive and tremendously successful development.
		Technical improvements translate into new applications and enhanced diagnostic accuracy and the new diagnostic opportunities may potentially be beneficial for many individuals with known or suspected cardiovascular disease.
		A very impressive demonstration of what joint efforts can achieve has been the most successful development of the Society of Cardiovascular Computed Tomography since its inauguration on March 2005.
	www.scct.org (383 words)

	Computed Tomography Scans Information on Healthline
		Patients who are known to be allergic to iodine (or shellfish) should inform the physician prior to the CT scan.
		It is essential that the patient lie very still during the procedure to prevent motion blurring.
		The screen before the technologist shows a computer's analysis of each section detected by the x-ray beam.
	www.healthline.com /galecontent/computed-tomography-scans (820 words)

	CAT Scan (CT) - Body
		CT (computed tomography), sometimes called CAT scan, uses special x-ray equipment to obtain image data from different angles around the body and then uses computer processing of the information to show a cross-section of body tissues and organs.
		Each profile is then reconstructed by a dedicated computer into a two-dimensional image of the section that was scanned.
		When the image slices are reassembled by computer, the result is a very detailed, multidimensional view of the body's interior.
	www.radiologyinfo.org /content/ct_of_the_body.htm (2092 words)

	Greenville Technical College \| Academic Programs
		This program prepares the post-graduate registered technologist to use x-rays and computer technology to produce cross-sectional anatomical images of the human body for diagnostic testing, radiation therapy treatment planning and forensic science investigation.
		The computed tomography program is a part-time, two-semester program, consisting of didactic courses online and clinical requirements performed, if possible, close to the student's home at a local clinical site.
		Registered radiologic technologists employed full- time in computed tomography may exempt the clinical component of the program with permission of the program coordinator.
	www.greenvilletech.com /academic_programs/tomography.html (545 words)

	Computed Tomography for Pulmonary Indications
		More recently, there has been interest in computed tomography (CT) scanning as a screening technique, using either spiral (also referred to as helical) or electron beam (also referred to as ultrafast) CT scanning.
		Computer-assisted diagnosis uses a computer algorithm to analyze features of a lesion to determine the level of suspicion and is intended to enhance the reader’s diagnostic performance.
		Spiral computed tomography screening for lung cancer is ready for prime time.
	www.regence.com /trgmedpol/radiology/rad32.html (2777 words)

	Computed Tomography (CT)
		Computed tomography (CT) uses specially designed X-ray equipment and computer technology to generate cross-sectional images of the body.
		Most scan sequences can be obtained in about 10 seconds – most patients can easily hold their breath for this long.
		With this quality of data collection, images can be computer generated in any plane through the body.
	escondidoimaging.com /computedtomography.htm (725 words)

	Computed Tomography (CT) Scan - Texas Heart Institute Heart Information Center
		A CT scan ("cat scan") is an x-ray technique that uses a computer to create cross-sectional (or slice-like) pictures of the heart.
		A computer then puts these images together to make one detailed picture.
		New computer technology now lets technicians stack the images on top of each other to get a 3-D image that can be rotated and viewed from any angle.
	texasheart.org /HIC/Topics/Diag/dicat.cfm (870 words)

	Computed tomography in children -- Griffiths and Morrison 329 (7472): 930 -- BMJ
		Computed tomography in children -- Griffiths and Morrison 329 (7472): 930 -- BMJ
		Computed tomography remains the imaging method of choice for
		Medical outcome after immediate computed tomography or admission for observation in patients with mild head injury: randomised controlled trial.
	www.bmj.com /cgi/content/full/329/7472/930?ehom (1310 words)

	Computed Tomography -- eCureMe.com
		Computed tomography is an examination that uses X-Rays to obtain cross-sectional images of the human body.
		When X-Rays are irradiated onto the human body, some of them are absorbed and some pass through the body to produce an image.
		A sophisticated computer system calculates and analyzes data from each detector and reconstructs multiple two-dimensional cross-sectional images.
	www.ecureme.com /emyhealth/data/Computed_Tomography.asp (964 words)

	COMPUTED TOMOGRAPHY
		Computerized tomography is used within all subspecialties of Radiology and this section will refer to the general daily operation of residents rotating through the Meehan Building.
		At mid-day and at the conclusion of the day the resident/fellow should review and sign all of their reports, making sure their queue is empty on the computer system before leaving work.
		When the procedure sheet is completed, it is brought to the CT secretary who then books the case and can call either the patient of the booking doctor’s office with the time.
	www.brown.edu /Departments/Diagnostic_Imaging/ResManual/ct.htm (6301 words)

	Computed Tomography (CT) Imaging or Scanning
		Depending on the type of study, the CT scanner or table will move slightly as low intensity x-ray beams are rotated at many angles around the patient.
		A computer collects the data from the scanner, calculates the density of a given cross-sectional slice, and produces the image onto film for study by a radiologist.
		If the patient's CT scan is to include a contrast agent, any known allergies should be discussed with the referring physician prior to the test.
	www.spineuniverse.com /conditions/072400spin_computedtomography.html (429 words)

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