ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Human head. Coloured composite image of a diffusion tensor imaging (DTI) scan of the brain and a 3D computed tomography (CT) scan of the skull of a 35 year old patient. The colours within the brain show the normal orientation of the white matter nerve fibres. Nerve fibres running right and left are red, those running front and back are blue, and those running interior and exterior are green.
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