News tagged with ct scan

Related topics: radiation dose · radiation exposure · emergency department · heart disease · ionizing radiation

Medical Physicists: CT Scans Safe

Mayo Clinic professor of radiological physics Cynthia McCollough calls last fall's news from Cedars-Sinai Medical Center the straw that broke the camel's back for the CT scan community, at least when it comes to public perception.

May 04, 2010
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Engineer to create 3D puzzle to mend broken bones

( -- An engineer at the University of the West of England is working with an orthopaedic surgeon from the Bristol Royal Infirmary and a specialized software company to enhance the management of complex, joints' ...

May 18, 2010
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Hospitals offer new take on medical mistakes

All Donald Platt wanted was an apology. The tumor on his kidney was the size of a baseball by the time his cancer was detected in a CT scan - five years after his doctor misdiagnosed his symptoms and failed to order the right ...

Mar 08, 2009
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CT scans for dizziness in the ER: Worth the cost?

Performing CT scans in the emergency department for patients experiencing dizziness may not be worth the expense – an important finding from Henry Ford Hospital researchers as hospitals across the country look for ways ...

Jan 26, 2012
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Americans get most radiation from medical scans

(AP) -- We fret about airport scanners, power lines, cell phones and even microwaves. It's true that we get too much radiation. But it's not from those sources - it's from too many medical tests.

Jun 14, 2010
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Computed tomography

Computed 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.

This text uses material from Wikipedia, licensed under CC BY-SA

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