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- Q1138872 subject Q7476784.
- Q1138872 abstract "Computed tomography (CT) of the head or Computed Axial Tomography (CAT) scanning uses a series of x-rays of the head taken from many different directions. Typically used for quickly viewing brain injuries, CT scanning uses a computer program that performs a numerical integral calculation (the inverse Radon transform) on the measured x-ray series to estimate how much of an x-ray beam is absorbed in a small volume of the brain. Typically the information is presented as a series of cross sections of the brain.In approximation, the denser a material is, the whiter a volume of it will appear on the scan, just as in the more familiar "flat" X-rays, where dense bone appears white. CT scans are primarily used for evaluating swelling from tissue damage in the brain, bleeding, and in assessment of ventricle size. Modern CT scanning can provide reasonably good images in a matter of minutes. A spiral CT scan of the head may be performed in 10–30 seconds, making it a good option for children and adults with difficulty holding still for longer periods. The use of contrast dye in CT angiography provides good visualization of the vascular structures and leaks in the blood vessels.".
- Q1138872 thumbnail Computed_tomography_of_human_brain_-_large.png?width=300.
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- Q1138872 wikiPageWikiLink Q7476784.
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- Q1138872 comment "Computed tomography (CT) of the head or Computed Axial Tomography (CAT) scanning uses a series of x-rays of the head taken from many different directions. Typically used for quickly viewing brain injuries, CT scanning uses a computer program that performs a numerical integral calculation (the inverse Radon transform) on the measured x-ray series to estimate how much of an x-ray beam is absorbed in a small volume of the brain.".
- Q1138872 label "Computed tomography of the head".
- Q1138872 depiction Computed_tomography_of_human_brain_-_large.png.