Abstract #0435

An Investigation on the Channel Spacing Limits in SSB-Based Wireless MRI Receiver Arrays

Matthew J. Riffe¹, Natalia Gudino¹, Michael D. Twieg², Jeremy A. Heilman³, Mark A. Griswold¹,⁴

¹Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States; ²Electrical Engineering and Computer Science, Case Western Reserve University, Cleveland, OH, United States; ³Quality Electrodynamics (QED), Mayfield Village, OH, United States; ⁴Radiology, Case Western Reserve University, Cleveland, OH, United States

Ideally in SSB-based wireless MRI, the frequency spacing between encoded signals is limited by the bandwidth of the MR acquisition. This would allow for a very dense wireless transmission spectrum, which is necessary when transmitting all the signals present in highly parallel detector arrays. Unfortunately, this dense spacing only works if the noise outside the MRI signal bandwidth does not impact the other multiplexed signals. In this work, we show that this interference can have a substantial impact and must be considered during design. We demonstrate this by constructing an eight channel wireless head array for 1.5T.