Definition of voxel
: any of the discrete elements comprising a three-dimensional entity (such as an image produced by magnetic resonance imaging) MRI produces the best resolution of any existing scanning technology, imaging down to a 2-millimetre “voxel” (the 3D equivalent of a pixel). — Clint Witchalls To process the MRI data, a computer overlaid on Pickens' brain a virtual three-dimensional grid of 50,000 cubes called voxels (a word hinting at volume and pixels). — Christopher Helman
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