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Abstract #2458

Optimal Spread Spectrum for Enhanced Multi-Receive Compressed Sensing MRI

Sulaiman A Al Hasani 1 , Gary F Egan 2 , and Jingxin Zhang 3

1 Electrical and Computer Systems Engineering, Monash University, clayton, VIC, Australia, 2 Monash Biomedical Imaging, Monash University, VIC, Australia, 3 School of Software and Electrical Engineering, Swinburne University of Technology, VIC, Australia

The reconstruction quality of CS is highly dependent on the level of signal (image) sparsity as well as the level of incoherent In conventional MRI, Fourier encoding concentrates the energy of MR signal in the center of k-space, this limits the incoherent sampling and hence hinders the performance of CS reconstruction. In this work, we propose a practical encoding scheme, based on the spread spectrum analysis of Chirp modulated Fourier sensing matrix, to enhance the incoherent sampling of multi-receive MRI. The proposed method outperforms Fourier encoding in preserving image quality at high acceleration factors.

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