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Abstract #0564

Approaching the ultimate intrinsic coil performance for 7T body imaging with high-density parallel transmit/receive arrays

Bart R. Steensma1, Ingmar J. Voogt2, Thijs Kraaij1,3, Peter R. Luijten1, Martijn Cloos4, Daniel K. Sodickson4, Dennis W.J. Klomp1, Cornelis A.T. van den Berg1, and Alexander J.E. Raaijmakers1,5

1Image Sciences Institute, University Medical Center Utrecht, Utrecht, Netherlands, 2Radiology, WaveTronica B.V., Utrecht, Netherlands, 3Avans Hogeschool Den Bosch, Den Bosch, Netherlands, 4New York University School of Medicine, New York, NY, United States, 5Biomedical Image Processing, Eindhoven University of Technology, Eindhoven, Netherlands

In order to calculate ultimate intrinsic signal-to-noise ratio and specific absorption rate efficiency in the prostate, a full electromagnetic basis was calculated in the Duke human model for a prostate scan configuration. Four high-density parallel transceive arrays were simulated in the same configuration using the Finite Difference Time Domain method, and are benchmarked against the ultimate coil performance. The best performing array is a 10 dipole/20 loop array, which can achieve 73% of the ultimate intrinsic coil performance. A 32 channel RF amplifier system was installed as an add-on to our Philips 7T Achieva system, and initial experimental results using a 24 channel loop/dipole array were demonstrated.

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