Determination of a magnetic resonance system-activation sequence on the basis of a reduced number of field distribution maps

摘要

It is a method for determining a magnetic resonance system-activation sequence (as). For this purpose, a first number of current field distribution maps (δb₀, Δb₁) for layers (sl, sl₁, .., Sl₈) the measuring range and it is acquired on the basis of a high frequency pulse train (mp) for the magnetic resonance system-activation sequence (as). This acquisition of the first number of current field distribution maps (δb₀, Δb₁) on the basis of a acquisition scheme can be carried out, according to the field distribution maps (δb₀, Δb₁) for a first number of field distribution representation layers (rs) to be determined which the field distribution maps (δb₀, Δb₁) a second number of layers with respect to a predetermined optimizing criterion, the number of field distribution representation layers (rs) is less than the number of layers (sl, sl₁, .., Sl₈). Likewise, on the basis of the acquired field distribution maps (δb₀, Δb₁) a reduced number of field distribution representation cards (δb₀R, δb₁R) to be determined which the first number of acquired field distribution maps (δb₀, Δb₁) according to a predetermined optimizing criterion, and the determination of the high frequency pulse train (mp) is carried out on the basis of these field distribution representation cards (δb₀R, δb₁R). In addition, a method for operating a magnetic systems (1), a field distribution cards-analysis device (30), a control sequence detection means (22) as well as a magnetic system (1) with such a control sequence detection means (22).