Meeting Banner
Abstract #2416

An XS-Guided Solution for BSSFP Banding Artifact Correction with Reduced Scan Time

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

bSSFP imaging is plagued by banding and general signal modulation stemming from off-resonance-induced phase accumulation. The geometric cross-solution (XS) eliminated all these artifacts using four phase cycled datasets; here a weighted solution of two phase cycled datasets coupled with weighting guide data is proposed. Weights are found by minimizing the regional differential energy of the solution from a low resolution XS guide. Weighting guided by 25% of the XS k-space phase encodes yields excellent signal demodulation, and uses a scan time comparable to the acquisition of only 2.5 regular bSSFP images.

Keywords

accelerated achieves acquiring added alloy amounts ample analytically arising artifact avoided balanced band banding bands bottle bottom caused challenge circumventions combination comparable complex compute computed consists correction correspond coverage cross curves cycled dark datasets demodulate demodulated demodulation denoted depict deviation differential diminishes efficient employed encodes energy equal equivalent error exceed excellent exploit expression field filtered formula formulated fraction free frequencies full fully general generated gold gradients guide guided hamming holding horizontally implemented independent indicated indicating inherent inhomogeneity inspire inverse knowledge known limitations linear local magnetization minimal minimizing modulation must need needed noise offers opportunity original padded parsimony pass phantom phenomena physics pixel pixels plots plotted plus powerful precession prevails previously prosthesis radiology reduced reduction redundancy refocuses regional relatively requirements resolution respectively retain retained revealed scanner search shortening significantly simulated since solution solutions solve somewhere space spatially stacked steady substantial suffers temporally transformed typically unique variable variably varied vertically water yield zero