Hardware Spectrometers Other hardware (MR) Lab equipment

Parallel transmission implant safety testbed

Application

Parallel transmission hardware and positioning system for all sorts of experiments around RF transmission

Contributors

Silemek Berk¹, Lukas Winter¹, Frank Seifert¹, Werner Hoffmann¹, Bernd Ittermann¹, Reiner Montag¹, Johannes Petzold¹, Harald Pfeiffer¹, Reiner Seemann¹

Contact

lukas.winter@ptb.de

Estimated cost

~45000€

Progress

CERN-OHL-W v2

Resources

https://gitlab1.ptb.de/mri-lab/ptx-implant-safety-testbed

A modular, flexible, open-source hardware configuration for parallel transmission (pTx) experiments on RF and medical implant safety. The hardware comprises a home-built 8-channel pTx system (scalable to 32-channels), wideband power amplifiers and a positioning system with submillimeter precision.

Specifications

  • 8-channel transmit RF chain 21-300MHz (easily scalable to 32)
  • 4-channel receiver (easily scalable)
  • Broadband power amplifiers, 20W continuous wave
  • Synchronized measurements with 3D positioning system COSI Measure
  • portable 19″ rack

Publications

Winter L, Silemek B, Petzold J, et al. Parallel transmission medical implant safety testbed: Real-time mitigation of RF induced tip heating using time-domain E-field sensors. Magnetic Resonance in Medicine 2020;84:3468–3484 doi: 10.1002/mrm.28379.

Silemek B, Seifert F, Petzold J, Hoffmann W, Pfeiffer H, Speck O, Rose G, Ittermann B, Winter L, “Rapid safety assessment and mitigation of radiofrequency induced implant heating using small root mean square sensors and the sensor matrix Qs”, Magnetic Resonance in Medicine, 2021, 87(1):509-527, doi: 10.1002/mrm.28968

Affiliations

1Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany

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