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Abstract #0494

Frequency and Phase Correction of GABA-edited MR Spectroscopy using Complex-valued Convolutional Neural Network

Hanna Bugler1,2,3,4, Rodrigo Berto1,2,3,4, Roberto Souza1,3,5, and Ashley D. Harris2,3,4
1Biomedical Engineering Department, University of Calgary, Calgary, AB, Canada, 2Department of Radiology, University of Calgary, Calgary, AB, Canada, 3Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada, 4Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada, 5Electrical and Software Engineering Department, University of Calgary, Calgary, AB, Canada

Synopsis

Keywords: Spectroscopy, Machine Learning/Artificial Intelligence, BrainEdited Magnetic Resonance Spectroscopy (Edited-MRS) is important for the quantification of ɣ-amino butyric acid (GABA) in vivo. However, during acquisition, data may suffer phase and frequency shifts, which affects the quality of the output spectrum. Frequency and phase correction (FPC) is necessary to account for these shifts, and deep learning models have obtained recent success in this task. Still, current methods do not take into consideration that MRS data is complex-valued. We propose a complex-valued convolutional neural network model for FPC. Our results showed that our model compares favorably against two recently proposed deep learning methods.

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Keywords