A rotary phased array coil system for Magnetic Resonance Imaging comprising: an array of coil elements in the form of four separate coils arranged in a rotary structure, wherein each coil element (1, 2, 3, 4) has a pair of mutually parallel main conductors located on opposite sides of a cylindrical space enclosed by the coil elements, wherein the coil elements are spaced equi-angularly around the cylindrical space with the angle between the nearest neighbouring coil elements being 180° divided by the number of coil elements, and wherein each coil element is located in a respective diametric plane of the cylindrical space; characterised in that the coil system further comprises: a decoupling circuit of decoupling inductors for mutually decoupling the coil elements; and a decoupling base comprising two or more meandering conductor bases (8, 9); wherein each coil element comprises decoupling inductors of said decoupling circuit, each of said decoupling inductors being counter wound and interlaced with respect to one of the decoupling inductors from an adjoining coil element of the array of coil elements for mutual decoupling; wherein the meandering conductor bases are interlaced with one another to form a meandering conduction path, similar to a pair of twisted wires, and wherein the main conductors of mutually orthogonal coil elements are connected to the same conductor base. an array of coil elements in the form of four separate coils arranged in a rotary structure, wherein each coil element (1, 2, 3, 4) has a pair of mutually parallel main conductors located on opposite sides of a cylindrical space enclosed by the coil elements, wherein the coil elements are spaced equi-angularly around the cylindrical space with the angle between the nearest neighbouring coil elements being 180° divided by the number of coil elements, and wherein each coil element is located in a respective diametric plane of the cylindrical space; characterised in that the coil system further comprises: a decoupling circuit of decoupling inductors for mutually decoupling the coil elements; and a decoupling base comprising two or more meandering conductor bases (8, 9); wherein each coil element comprises decoupling inductors of said decoupling circuit, each of said decoupling inductors being counter wound and interlaced with respect to one of the decoupling inductors from an adjoining coil element of the array of coil elements for mutual decoupling; wherein the meandering conductor bases are interlaced with one another to form a meandering conduction path, similar to a pair of twisted wires, and wherein the main conductors of mutually orthogonal coil elements are connected to the same conductor base. a decoupling circuit of decoupling inductors for mutually decoupling the coil elements; and a decoupling base comprising two or more meandering conductor bases (8, 9); wherein each coil element comprises decoupling inductors of said decoupling circuit, each of said decoupling inductors being counter wound and interlaced with respect to one of the decoupling inductors from an adjoining coil element of the array of coil elements for mutual decoupling; wherein the meandering conductor bases are interlaced with one another to form a meandering conduction path, similar to a pair of twisted wires, and wherein the main conductors of mutually orthogonal coil elements are connected to the same conductor base.