ESTRO 2024 - Abstract Book

S3782

Physics - Image acquisition and processing

ESTRO 2024

yields single-channel SNR reduction proportional to √ N mux =2. However, we anticipate the benefit of adding coil channels with various sensitivity profiles to outweigh this SNR penalty.

Conclusion:

An add-on signal multiplexer was presented for the image acquisition chain in the MR-linac, making the system compatible with many-element radiolucent receive coil assemblies. Successful coil channel combination and separation was demonstrated. Pending final SNR improvements, we expect that this solution will enable a drastic imaging speedup and thereby help overcome the imaging challenges for real-time online-adaptive MRgRT in the central thorax.

Keywords: MR-linac coils, MRI multiplexing, real-time IGRT

References:

[1] Zijlema, Stefan E., et al. "Improving the imaging performance of the 1.5 T MR-linac using a flexible, 32-channel, on body receive array." Physics in Medicine & Biology 65.21 (2020): 215008.