Patent ID: 7417435
Filing Date: 2008-08-26
Classification: G01R

Abstract:
1. A method for generating a homogenous magnetization in a spatial examination volume of a magnetic resonance system during examination of a subject located in the examination volume, said magnetic resonance system comprising a whole-body antenna comprising a plurality of resonator segments that are electromagnetically decoupled from each other, and a control and evaluation device connected to said plurality of resonator segments, said method comprising the steps of: storing predetermined, segment-specific excitation parameters for the respective resonator segments of said single whole-body antenna in said control and evaluation device; with said control and evaluation device, separately activating said plurality of resonator segments of said whole-body antenna corresponding to said excitation parameters in a temporal sequence within a single magnetic resonance excitation sequence using different sets of said excitation parameters, with each set of excitation parameters producing a different phase distribution of the nuclear magnetization distributions in the examination volume, to cause said nuclear magnetization distributions to constructively overlap to form a homogenous total nuclear magnetization distribution in said examination volume resulting from said single excitation sequence, and using a number of said different parameter sets to cause local power losses, introduced into the examination volume in said single excitation sequence as a consequence of activation of the respective segments with said parameter sets, to be locally differently situated in the patient, with said local power losses not coinciding and not mutually reinforcing during said single excitation sequence.