Nmr - tomographic methods, on the basis of nbsem, with 2d - spatial encoding by means of two which are rotated relative to each other multipole - gradient fields

摘要

A method of the imaging magnetic resonance (nmr),with the aid of a gradient system (1) a spatially and temporally variable magnetic field b_degrees for at least two-dimensional location of nmr - measurement signals in an area of a measuring sample,in which the magnetic field b_degrees during an individual measurement cycle from the exciting to for reading out of the nmr - measuring signals in at least two pressed-out portions b_degrees¹ (Sem_C.) and b_degrees² (Sem_Ic) in the area of the measuring sample is used,the first embodiment b_degrees¹ (Sem_C.) essentially ns - pole is formed, with ns an even number ≧ 2, and ns has substantially sector-shaped portions, in each of which locally in a direction, a monotonic course of the magnetic field b_degrees is present,the receiving device of the measured signals of the measuring sample by means of at least ns receiving coils (61a, 61b) which is representative of a different sensitivity over the ns of the partial regions of the area to be imaged, is characterized in that the second embodiment b_degrees² (Sem_Ic) in the substantially identical to the first embodiment b_degrees¹ (Sem_C.) is provided, wherein the second embodiment b_degrees² (Sem_Ic) with respect to the first embodiment b_degrees¹ (Sem_C.) by an angle δφ, δφ = (360°) / 2 · ns, is twisted. The present invention provides an imaging nmr - a method is available, in which, below the use of the advantages of nbsem, rapid a good resolution. ..