Comparison of Phase Estimation Methods for Quantitative Susceptibility Mapping Using a Rotating-Tube Phantom

Figure 3

(a) The histogram of the error (in Hz) when the measurement is obtained with the SEGE + GBC phase estimation method. The error data is pooled over all ROI voxels, all backgrounds, rotations, and tubes. (b) The histogram of the absolute relative error seen with the same measurement. (c) The corresponding Cumulative Distribution Function of the error in (b). The inset figure shows a portion of this CDF within [0, 0.3] to better illustrate the distributions within reasonable error range. In this case, the CDF shows that the probability of obtaining less than 0.1 is around 0.66 with the SEGE + GBC pair. The maximum observed was 27.0 Hz, and the maximum observed was 6.85, illustrating the occasional large errors that may result with SEGE + GBC.

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(b)

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