False-colour venograph of the human head

False-colour venograph of the human head

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Credit: ALAIN POL, ISM/SCIENCE PHOTO LIBRARY

Caption: False-colour venograph (phlebograph) of the human head, showing the network of normal veins that drains blood from the brain; the veins are coloured red. Venography is the X-ray examination of a vein that has been outlined by the prior injection of a radio-opaque contrast medium. The technique is used to determine whether damage, obstruction or abnormal communication with other vessels is occurring; abnormalities are indicated when the vein is incompletely filled by the contrast medium, or when the medium appears to be leaking from the vein.

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Keywords: anatomy, brain, central nervous system, cns, false-coloured, human body, of brain, phlebography, vein, venography

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