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.
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