Abstract: Magnetic resonance apparatus includes a magnet system for generating a steady magnetic field in a measuring space, which steady magnetic field is oriented mainly parallel to one of the axes of an orthogonal coordinate system, a gradient system with gradient coil systems and with a controlled source for supplying the gradient coil systems with excitation currents with a predetermined variation in time. The gradient coil systems include a number of linear gradient coil systems, each of which is arranged to generate a main gradient field which is dependent on the location of the field in the measuring space in such a manner that a magnetic field formed by superposition of one of the main gradient fields on the steady magnetic field can be described, as a function of the coordinates of the coordinate system, as a series containing first-order terms and higher-order terms, the first-order terms having predetermined coefficients which are equal to zero for two of the coordinates.

Abstract: Magnetic apparatus resonance includes a mainly cylindrical RF coil (9) which has a central axis (35) extending in its longitudinal direction and comprises a number of axial conductor elements (37) which extend parallel to the central axis across a mainly cylindrical surface, and also comprises end conductor elements which extend around the central axis near the ends of the axial conductor elements. The axial conductor elements (37) are distributed across the circumference of the cylinder in such a manner that they occupy predetermined positions relative to a zero position (39). The RF coil (9) is arranged to generate a substantially sinusoidal current distribution as a function of the position of the axial conductor elements (37) on the circumference of the cylinder, expressed as the angle (.alpha.) of this position relative to the zero position (39), in order to enable a substantially uniform RF magnetic field, oriented perpendicularly to the cylinder axis (35), to be generated and/or received.