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Abstract #3314

Four-row MR-linac receive array with remote circuitry to preserve radiation transparency

Karthik Lakshmanan1,2,3, Lindsay Phillips1,2,3, Jerzy Walczyk1,2,3, and Ryan Brown1,2,3
1Center for Advanced Imaging Innovation and Research, New York University Grossman School of Medicine, New York, NY, United States, 2Center for Biomedical Imaging, New York University Grossman School of Medicine, New York, NY, United States, 3Radiology, New York University Grossman School of Medicine, New York, NY, United States

Synopsis

Keywords: RF Arrays & Systems, RF Arrays & Systems, MR-linac, radiolucent

Motivation: Linac-compatible coils have been restricted to one or two rows because of the desire to place radiation-opaque circuitry adjacent to the coils and outside the window through which the beam travels. Such layouts limit parallel imaging performance.

Goal(s): We previously showed that a remote circuit strategy allows greater freedom in array layout but carries a loss penalty. Here, we explored its limits.

Approach: We built a four-row array with remote circuits and compared it to two- and three-row arrays with similar coverage.

Results: The four-row array provided similar central SNR and significant g-factor advantages compared to the two- and three-row arrays

Impact: High performance, multi-directional parallel imaging enabled by remote circuits in a four-row array can potentially support MR-linac applications that require rapid imaging and high SNR.

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