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A Machine Called Indomitable : The Remarkable Story of a Scientist's Inspiration, Invention, and Medical Breakthrough by Sonny Kleinfield

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NINE

The human scanner took its first form on paper. The nucleus of the device was a giant magnet. How big a magnet it would take was an unanswerable question. Many people at the time thought a human scan was impossible no matter how large the magnet was. The NMR signal was feeble enough from a test tube. Damadian considered building a resistive magnet, but he was sufficiently unfamiliar with such magnets to fear that he wouldn’t be successful. Also, he recognized that it was unfeasible to build a resistive magnet that could enclose a human subject and that was more powerful than one thousand gauss, and he was dubious that that would be strong enough to produce an image. “So I tried to build the most powerful magnet I could dream of building. ...

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