CT, which stands for computed tomography, builds up a more revealing picture than a simple x-ray by taking a series of cross-section pictures.

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But now the simple invention of a cathode ray tube, transforming light into electrons, registering their impact on the magnetic tape, had torn the curtain away.

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Several years ago, during a simple diagnostic chest X-ray, Centor discovered a growth on the lung of one of his patients, who appeared to be in good health.

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