| 摘要 |
FIELD: instrumentation.SUBSTANCE: invention relates to instrumentation and represents a method for magnetic-resonant shaping of images and a system for its implementation. At implementation of the method using a set of radio-frequency transmission coils, some number of Bfield mapping sequences, which is less than the number of coils of the set, is performed; a set of Bfield mapping data is obtained and sensitivities of coils in a basis of the obtained set of Bfield mapping data are determined; with that, the determined coil sensitivities are used for Bshimming. As per some versions, the performed sequences of Bfield mapping are set by linear conversion as per a set of radio-frequency transmission coils for formation of a set of orthogonal virtual radio-frequency transmission coils and for selection of a sub-set from a set of orthogonal virtual radio-frequency transmission coils, which sets the performed Bfield mapping sequences.EFFECT: increasing degree of homogeneity of transmitted field Beither in a non-filled or in a filled state.14 cl, 7 dwg |
