1. A method for prescribing geometry of an imaging volume of a structure of interest positioned in a magnetic resonance (MR) imaging system, comprising: a) selecting a first boundary plane of the structure of interest, wherein the first boundary plane is prescribed by a first imaging section of the structure of interest; b) determining a first geometry information corresponding to the first imaging section of the structure of interest; c) storing the first geometry information in the MR imaging system; d) selecting a second boundary plane of the structure of interest, wherein the second boundary plane is prescribed by a first imaging section of the structure of interest; e) determining the second geometry information corresponding to the second imaging section of the structure of interest; f) storing the second geometry information in the MR imaging system; and g) applying the first and second geometry information of the first and second imaging sections, respectively, to prescribe a boundary geometry defining a subsequent imaging volume of the structure of interest.