The elliptical signal model (ESM) for bSSFP imaging exhibits potential for quantitative imaging. Recent work proposed the first analytical T2 solution based on the bSSFP ESM, with instability at large T2 values. Instead of using the sum of squares (SOS) to combine multiple intermediate solutions, here a multi-step regional variance weighting methodology is proposed to generate a refined analytical T2 computation. The new method for T2 computation improves T2 computation performance relative to the SOS and near problematic dark bands, inspiring novel clinical applications of bSSFP in quantitative imaging.
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