Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1997-07-31
2000-04-25
Oda, Christine K.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324319, 600410, G01V 300
Patent
active
060548541
ABSTRACT:
Although magnet coil windings are distributed discontinuously, the distribution of magnetic fields generated actually approaches a desired continuous distribution. The desired continuous distribution is defined analytically, as closely as possible. A system for acquiring magnetic resonance data has a coil segment formed by winding a conductor on a bobbin representing an axial direction. A magnetic field is generated by supplying current into the conductor. Winding positions at which the conductor is wound turn-by-turn on the bobbin are determined in agreement with a specified current step value and sequentially from a winding positioned at an outermost end of the coil segment in the axial direction. Additionally, a shunt element for shunting the current carried turn-by-turn is arranged in the coil segment in relation to a pattern of turns of the coil segment by winding the conductor into a plurality of current flows through a plurality of shunt paths.
REFERENCES:
patent: 5334937 (1994-08-01), Peck et al.
patent: 5512828 (1996-04-01), Pausch et al.
Turner, "Gradient Coil Design: A Review of Methods", Magnetic Resonance Imaging, vol. 11, pp. 903-920, 1993.
Carlson et al, "Design and Evaluation of Shielded Gradient Coils", Magenetic Resonance in Medicine, vol. 26, pp. 191-206, 1992.
Kabushiki Kaisha Toshiba
Oda Christine K.
Shrivastav Brij B.
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