SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Brain fibres and structures. T2-weighted 2D MRI scan of the brain (black-and-white). This scan passes through the midbrain. Diffusion tensor imaging measures the direction of water diffusion, which in the brain reveals the orientation of nerve fibres. The technique is also known as tractography (tract density imaging), with the resulting image known as a tractogram.
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