Abstract #0158

Inter-Channel Correlation-based EMI Noise Removal for Shielding-Free Low-field Portable MRI

Yiman Huang^1,2, Shuxian Qu^2,3, and Xiaotong Zhang^1,2,3,4

¹College of Electrical Engineering, Zhejiang University, Hangzhou, China, ²MOE Frontier Science Center for Brain Science and Brain-machine Integration, Zhejiang University, Hangzhou, China, ³The Interdisciplinary Institute of Neuroscience and Technology, College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China, ⁴Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China

Synopsis

Keywords: Low-Field MRI, Low-Field MRI

Motivation: The current electromagnetic interference (EMI) noise removal approaches for low-field portable magnetic resonance imaging (MRI) only focus on single receive coil EMI removal, which ignores noise relationship among coil elements of RF coil arrays.

Goal(s): Our goal was to remove EMI noise in receive coils not only related to EMI detectors, but also among receive coil elements.

Approach: A signal correlation matrix was constructed from signals acquired by EMI coils and receive coils, and decorrelation matrix was calculated for EMI noise removal.

Results: Phantom results and pilot in vivo human brain images showed that the proposed method have better EMI noise removal rate.

Impact: The proposed EMI noise removal method for unshielded low-field MRI can better improve signal-to-noise ratio (SNR) compared to state-of-the-art methods, which enable the EMI noise removal for array coils in low-field portable MRI application.

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