Abstract #4405

Analog optical wireless MRI: Proof-of-concept for RF signal transfer and system transparency

Roberta Frass-Kriegl¹, Michael Franz Hauser², Jean-Lynce Gnanago¹, Lukas Baumgartner², Onisim Soanca¹, Andreas Hodul³, Kerstin Schneider-Hornstein², and Michael Hofbauer^2,4

¹High Field MR Center, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, ²Institute of Electrodynamics, Microwave and Circuit Engineering, Technische Universität Wien, Vienna, Austria, ³Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, ⁴Automation and Control Institute (ACIN), Technische Universität Wien, Vienna, Austria

Synopsis

Keywords: New Devices, New Devices, wireless, optical

Motivation: Wireless RF coils are targeted in past and on-going research, however none of the technologies investigated led to a large-scale breakthrough so far.

Goal(s): To investigate the feasibility of analog optical wireless signal transfer as alternative to digital-GHz-wireless approaches.

Approach: A receive-only surface coil was connected to a 3T MR scanner using analog optical freespace communication. Passing an on-coil preamplifier, the MR signal directly modulates a laser, transmitting it onto an optical receiver, and is then fed to the conventional RF receive chain of the MR scanner.

Results: MRI was successfully performed with optical wireless analog signal transfer.

Impact: This work successfully demonstrates the feasibility of analog optical wireless MRI. Signal transfer from a receive-only RF coil to the image processing unit of a 3T MR scanner was implemented and resulted in artifact-free images.

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