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 Kraaij^1,3, Peter R. Luijten¹, Martijn Cloos⁴, Daniel K. Sodickson⁴, Dennis W.J. Klomp¹, Cornelis A.T. van den Berg¹, and Alexander J.E. Raaijmakers^1,5

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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