Healthy brain, SPECT scan

Healthy brain, SPECT scan

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Credit: ISM/SCIENCE PHOTO LIBRARY

Caption: Brain scan. Coloured SPECT (single photon emission computed tomography) scan of a normal human brain, seen in axial (horizontal) section. The red areas show the most active regions of the brain, which have taken up more of the radioactive tracer that was injected into the brain's blood supply. The tracer is technetium-99m (Tc-99m). The image shows the symmetry of the brain, which is divided into two hemispheres (right and left). The tracer is detected by its emission of gamma ray photons, and the image is constructed using computed tomography techniques. For a SPECT scan of an Alzheimer's disease patient's brain, see image M108/522.

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Keywords: anatomy, axial, brain, central, cns, coloured, computed tomography, ct, gamma, healthy, human body, medical, nervous system, neuroimaging, neurology, normal, nuclear, radioactive tracer, radioactivity, scintigram, scintigraph, scintigraphy, section, sectioned, single photon emission, slice, spect scan, tc-99m, technetium, tissue, transverse

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