This new system, as with a traditional CAT scan, uses X-rays shot from multiple angles, and assembled into one three-dimensional image by a computer.

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Digital systems, which process pixels one at a time, have to translate the two-dimensional image into a one-dimensional stream of data.

ECONOMIST: Analogue computing

"The prevailing image of Booth is one of a two-dimensional, mustache-twirling villain, " Johnson says.

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