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Purpose : To efficiently evaluate phased array coil performance using a software tool box with which we can make visualcomparison of the sensitivity of every coil element between the real experiment and EM simulation. Materials and Methods: We have developed a C++- and MATLAB-based software tool called Phased Array Coil Evaluator(PACE). PACE has the following functions: Building 3D models of the coil elements, importing the FDTD simulation results,and visualizing the coil sensitivity of each coil element on the ordinary Cartesian coordinate and the relative coil positioncoordinate. To build a 3D model of the phased array coil, we used an electromagnetic 3D tracker in a stylus form. Aftermaking the 3D model, we imported the 3D model into the FDTD electromagnetic field simulation tool. Results: An accurate comparison between the coil sensitivity simulation and real experiment on the tool box platform hasbeen made through fine matching of the simulation and real experiment with aids of the 3D tracker. In the simulationand experiment, we used a 36-channel helmet-style phased array coil. At the 3D MRI data acquisition using the spoiledgradient echo sequence, we used the uniform cylindrical phantom that had the same geometry as the one in the FDTDsimulation. In the tool box, we can conveniently choose the coil element of interest and we can compare the coil sensitivitieselement-by-element of the phased array coil. Conclusion: We expect the tool box can be greatly used for developing phased array coils of new geometry or for periodicmaintenance of phased array coils in a more accurate and consistent manner.

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