Real Time Shimming


Applications Signal Flow Timing Compatibility Specifications Additional Information	REAL TIME SHIMMING - The Load&Go^TM Approach Signal Flow The figure below illustrates the flow of signals in the L&G^TMshimming system.


	Initially a 3D B0 map of the target region is acquired. The B0 map is decomposed into its spherical harmonics constituents, their composition analyzed and shim values for optimal shimming of each slice calculated. The L&G^TM stores the settings for each slice in separate files, loads the complete set of files into the console’s memory and waits for a trigger from the console. The console releases a TTL trigger when the image acquisition of each slice is initiated. Upon release of each trigger, the corresponding shim file is activated and shim currents are set to the required values. The console runs the pulse sequence for that given slice and reinitiates the same process for the next slice.