Quantitative Evaluation of Eddy Current Distortion as Part of Quality Assurance Protocol for Multicenter DTI Trial at 3T

Eddy current artifact is different for each scanner model due to different sequence and calibration algorithm in use. It is beneficial to monitor eddy current artifact quantitatively and effectively correct it in a multi-center DTI trial. A quantitative evaluation of eddy current method as part of QA protocol was developed and applied to 27 scanners. It is an effective method to detect scanners with poor eddy current calibration and can monitor the eddy current distortion effects at sites longitudinally. This method also can quantitatively evaluate how effectively an eddy current correction method can reduce this artifact.

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