Boots – shoes – and leggings
Patent
1987-03-23
1989-01-24
Smith, Jerry
Boots, shoes, and leggings
324309, G06F 1542, G01R 3322
Patent
active
048004944
ABSTRACT:
A method and apparatus for exciting slices of an object in an NMR device in a specific order. N slices are indexed from 0 to (N-1). An integer X relatively prime to N is selected and the finite sequence I.sub.0 +kX, k+0, . . . , (N-1) is generated where I.sub.0 is a selected integer. The least positive residue r.sub.k satisfying r.sub.k .ident.I.sub.0 +kX(Mod N) is calculated and then the slice S.sub.r.sbsb.k is excited before the slice S.sub.r.sbsb.(k+1) for k=0, . . . , (N-2). The method and apparatus disclosed ensures that slices are excited in an order which reduces the resonant signal contamination present in a slice from the excitation of previously excited slices.
REFERENCES:
patent: 4665367 (1987-05-01), Kramer et al.
D. I. Hoult, "Rotating Frame Zeugmatography", Journal of Magnetic Resonance, 33, (1979), pp. 183-197.
"Communications, Towards Biochemical Imaging", Journal of Magnetic Resonance, 40, pp. 209-212, (1980).
H. N. Shapiro, "Introduction to the Theory of Numbers", John Wiley & Sons, pp. 131-188, (1983).
B. M. Stewart, "Theory of Numbers", the Macmillan Company, New York, Second Edition, pp. 89-95.
Baker Stephen M.
Cole Stanley Z.
Dooher Terrence E.
Fisher Gerald M.
Smith Jerry
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