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Abstract #0143

Real-Time Shim Compensation in the Human Breast

SUMMA25Vincent Oltman Boer1, Mariska P. Luttje1, Alex A. Bhogal1, Giel Mens2, Hans Hoogduin1, Peter R. Luijten1, Dennis W.J. Klomp1

1Radiology, UMC Utrecht, Utrecht, Netherlands; 2Philips Medical Solutions, Best, Netherlands

Real-time control of the shim fields will allow for compensation of B0 field variations in the human body caused by breathing, cardiac pulsation, non-voluntarily motion, scanner drift etc. In this work the feasibility of real-time measurement and updating of the shim fields is examined and applied to real-time measurement and correction of the B0 field in the human breast at 7T.

Keywords

ability accurate acquisition acquisitions allow allowed allows already analyzed around artifacts assess back bank best body bore breast breathing bring calculation calculations calibrated capability caused changing channels close coil coils communication compensation compromising concurrent consisted consisting console control correct correction corrections demonstrating design designed detection developed direct disturbances domain drift durations dynamic eddy either equipped especially established estimation excitation fast feasible field fields fluctuations frequency generated glandular good gradient handling heartbeat human improved impulse individual integrated integration interfaced lead linear local localized location long magnet maps medical mens module monitor motion note offset pair partially parts peter physiological placed potentially probe probes processing protocol pulse quality radiology real reduce reduction relatively reliable reproducibility response restores scanning sensitivity serial setup several severe shape shim short simple sources spatial spectrometer spectroscopy stability steam susceptibility system temporal temporally terms thin timing tissue tube tuned ultra unit update updated updating variation variations voluntary water wound