Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1990-09-24
1993-03-30
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
336224, G01R 3320
Patent
active
051987694
ABSTRACT:
A tesseral gradient coil for use in a nuclear magnetic resonance tomography apparatus is disposed in the hollow-cylindrical interior of the magnet system which generates the fundamental magnetic field, with one segment of each turn of the gradient coil lying on a small radius and one segment lying on a large radius, with reference to the cylinder access. The parasitic magnetic field which is unavoidably generated by the gradient coil, and which induces currents in the examination subject and in the cryostat of the fundamental field magnet system, is significantly reduced by this coil arrangement. The structure of the gradient coil is particularly suitable for use in the echo planar method, wherein the gradients must be switched rapidly and induced currents are therefore especially disturbing.
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"Magnetic Field Gradient Coils for NMR Imaging", Bangert et al. J. Phys. E. Sci. Instrum., vol. 15, 1982 pp. 235-239.
Frese Georg
Stetter Eckart
Mah Raymond Y.
Siemens Aktiengesellschaft
Tokar Michael J.
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