Meeting Banner
Abstract #2417

Signal Demodulation of BSSFP Imaging with a Two-Point Algebraically Weighted Solution

Michael Nicholas Hoff1, Qing-San Xiang1, 2

1Physics, University of British Columbia, Vancouver, British Columbia, Canada; 2Radiology, University of British Columbia, Vancouver, British Columbia, Canada

Banding and general signal modulation disturb the diagnostic viability of bSSFP imaging. Previous algebraic and geometric techniques have shown that complete signal demodulation is possible with four phase cycled bSSFP images. Here a two-image algebraic solution is employed to demodulate signal and to guide an improved Algebraically Weighted Solution (AWS). The AWS uses regional least squares processing to reduce residual banding. Relative to a gold standard reference image, the AWS exhibits 60% or less error than a two-image complex sum in all scenarios tested. AWS represents a viable bSSFP demodulation solution which is especially valuable for time-sensitive imaging.

Keywords

able accumulation achieved added algebraic algebraically alloy appear applied balanced band banding bands benefit bottle bottom brief combination complex computed considerable consistently constrained correct corrected correction cross cycled dark demodulation demonstrating depicts derived develops deviation drift employed employs equations error exceeds existence expressed fast feasibility field formulated free full geometric gold golden hindered historically holding horizontally imaginary independent indicate inherent inhomogeneity input inspired instabilities known least magnetization minimization mitigate modulation motion necessary noise noisy numerical offset optimization original outperforms part parts pass performance phantom physics pixel post precession predictable problem processed processing prosthesis radiology real recently reduction redundancy refocus reformulated regional relatively representing require residual resonant respect revealed routine scanner section sensitive sensitivity sifted sifting simple simulated simulations slices solution solutions solving spatial squares stacked steady structure subsequent substantial suitable terms theory varied vertically water yielded yielding