Design data for efficient axial gradient coils: Application to NMR imaging
✍ Scribed by Hervé Saint-Jalmes; Jacques Taquin; Yves Barjhoux
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 335 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
A new design for an axial magnetic field gradient is described. Implemented in a four-coil configuration, it requires far less power than the conventional Maxwell pair, while maintaining the same field linearity. A practical design tool with a set of curves giving coil dimensions is proposed. Two realizations dedicated to NMR imaging are described and compared with the equivalent Maxwell pair. Substantial power reductions are achieved; in these cases, dc power is reduced by a factor of 5 and switching power by a factor of 15. 0 1985 Academic Pras. Inc. 245 0740-3 194/85 $3.00 Copynghl C c 1'4x5 hy Acudcmic Press. lnc All righls oi'rcprducuon in any form n x w e d . FIG. I . Description of the coordinate system for computing the B, component of the induction created at point M by a circular current loop.