Brief Encounter with Technicare

Peter Mansfield

in The Long Road to Stockholm

Published in print January 2013 | ISBN: 9780199664542
Published online January 2013 | e-ISBN: 9780191758461 | DOI:
Brief Encounter with Technicare

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The author was courted to join the Technicare company in 1984. Jean and the author, together with their two children, flew to New York, stayed at the Plaza Hotel, met Jack McConnell who flew us in a small company jet to the Technicare headquarters. After initial discussions they were flown to Las Vegas and the Grand Canyon for a few days, then on to San Francisco and Los Angeles, then home. On another occasion in the early eighties, he was head-hunted by three Universities, University of Illinois, Urbana, University of Alabama, Birmingham and university of Wisconsin at Madison. He had job offers from all three Universities but delayed all three until they returned to England. On arrival in Nottingham he discovered a letter from the Department of Health offering him a 0.5 T superconductive magnet, which he accepted. At the same time he sent letters to all 3 American Universities politely turning down their offers. Following the grand exodus, Barry Chapman joined by group as a post-doc. The new magnet was powered up to .5 T but he was worried about it quenching when using the powerful gradient pulses to be used in fast imaging. His research student, Martin Cawley, had been trying out a few suggestions using simple coils wound on copper tubes. Suddenly the solution to the problem came to him in a flash of inspiration. He rushed down to tell Barry his thoughts and they both started to think how to calculate and design a shielded gradient coil. He had earlier mentioned the problem to Bob Turner, a replacement Lecturer for me, as he was on a special 5 year MRC grant. Bob made little progress but mentioned the problem to Roger Bowley, a theoreticion. The two soon came up with an elegant solution to the design of active magnet screens. In the mean time, he together with Barry, had filed a provisional patent on magnet screening of gradient coils, however in the final patent application, they included Bob Turner and Roger Bowley. Finally some initial experiments were carried out by Michael Stehling and Paul Harvey on echo volumer imaging (EVI) at .5 T. Later work at 3 T was done by Ron Coxon and Paul Glover. Further EVI experiments were carried out by Jonathan Hykin and Ron Coxon and published in J.CAT. This work was awarded the Editor’s prize.

Keywords: Technicare; Las Vegas; Alabama; Wisconsin; Urbana; 0.5 T magnet; shielded gradients; EVI

Chapter.  3163 words. 

Subjects: Physics

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