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Abstract #0666

Matrix Gradient System: Concept and Performance Evaluation

Feng Jia1, Gerrit Schultz1, Anna M. Welz1, Sebastian Littin1, Hans Weber1, Jrgen Hennig1, Maxim Zaitsev1

1Dept. of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, Germany

Encoding with nonlinear encoding fields (SEMs) has raised increasing interest in the past few years. Matrix coils appear to offer a high flexibility in generating customized SEMs and are particularly promising for localized high resolution imaging applications such as PatLoc or ExLoc. However, up to now, it is still an open question of how to assess the performance of such matrix coils. In this work we propose a new performance measure that is oriented towards optimal local encoding. An optimization problem is formulated that results in high-performance cylindrical matrix coil designs with a high number of elements. The results are tested and the analysis reveals novel features of matrix coil designs.