tomography apparatus has a set of saddle coils disposed on a first cylindrical surface for generating the x gradient and a set of saddle coils disposed on a second separate cylindrical surface for generating the y gradient the saddle coils in each set include three sub coils having predetermined ampere turns and formed by cable conductor wound exclusively by convex turns arranged in the same cylindrical surface a middle coil of the three sub coils has an arced portion facing the z u2550 0 plane in an x y z coordinate system which approximates an arc of an ellipse application_number US 44221189 A description in the embodiment of gradient coil system shown in fig1 each set of gradient coils for respectively generating the x gradient and y gradient consists of four saddle coils with only two of those saddle coils being visible in fig1 two such saddle coils 2 and 3 can be seen in the drawing which are part of the set of coils for generating the y gradient g y in the direction of the y axis of a rectangular coordinate system on which the x axis is also shown in fig1 the saddle coils 2 and 3 are disposed opposite one another in the winding bend of a hollow cylindrical carrier member 6 indicated in dot dash lines the fundamental field of a nuclear magnetic resonance tomography apparatus in which the gradient coil system is to be used proceeds in the z direction i e in and out of the page of this coordinate system the conductors 2 and 3 are equidistantly spaced from the x z plane with the length of the arced portions of.