Tesseral gradient coil for nuclear magnetic resonance tomography apparatus

In a tesseral gradient coil for a nuclear magnetic resonance tomography apparatus, said apparatus having a basic field magnet with a hollow-cylindrical interior on which said tesseral gradient coil is disposed for generating a magnetic field gradient, said tesseral gradient coil comprising a segmented coil including at least two coil segments spaced in an axial direction, each coil segment being composed of at least two windings arranged symmetrically in a plane oriented perpendicularly relative to a center line of said interior, each winding being composed of an inner winding part laying on a smaller radius around said center axis and an outer winding part lying on a larger radius around said center axis and an outer winding part lying on a larger radius around said center axis, said inner and outer winding parts respectively having current flowing therein in opposite directions, the improvement comprising:

• said outer winding part being composed of a first plurality of ampere-turns and said inner winding part being composed of a second plurality of ampere turns, said first plurality being less than said second plurality.