The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 1996
Filed:
Jun. 16, 1995
Michael Westphal, Offenbach, DE;
Bruker Analytische Messtechnik GmbH, Rheinstetten, DE;
Abstract
A gradient coil system for the production of a magnetic transverse gradient field G.sub.x in an NMR tomograph is presented. The main magnetic field B.sub.z is directed along the z-axis, the magnetic transverse gradient field G.sub.x along the x-axis, and the gradient coil system comprises four partial coils (S.sub.1x, S.sub.2x, S.sub.3x, S.sub.4x) each with two current connections (A.sub.1, A.sub.2). The coils are arranged mirror symmetrically with respect to the xy-plane (z=0) and mirror symmetrically with respect to the zy-plane and each partial coil contains only winding sections on an inner and an outer cylinder Z.sub.ix, Z.sub.ax about the z-axis as well as in a radial connecting plane V.sub.+x, V.sub.-x parallel to the xy-plane. The partial coils are configured in such a fashion that the winding sections on the inner and outer cylinder Z.sub.ix, Z.sub.ax are axially further removed from the xy-plane than the corresponding radial connecting planes V.sub.+x, V.sub.-x, and the axial separation d.sub.Vx of the connecting planes V.sub.+x, V.sub.-x from each other is less than the radial separation d.sub.Zx between the inner and the outer cylinder Z.sub.ix, Z.sub.ax. In this fashion a nearly perfect outward shielding is achieved.