Figure 5.6 - no phase wrapping as text indicates

[mathieuboudreau]

See : http://qmrlab.org/mooc/multi-frequency-population

generated by file : https://github.com/qMRLab/mooc/blob/mb/dev/5%20B0%20Mapping/2%20Dual%20echo%20B0%20mapping/Notebooks/Figure-5-2-4.ipynb

This phase maps don't seem to match the images that were in the Google doc either. Note I also tried the original non-split file, and still get this result: https://github.com/qMRLab/qMRI-MOOC_B0-module/blob/main/content/chapter4_2.ipynb

[po09i]

As mentioned previously, phase wraps are visible where phase transitions from −π to +π and will be discussed in more detail in the next chapter. The phase difference and B0 field maps are also shown. Note that taking the phase difference eliminates the wraps in this example, however, there could be residual wraps when the field is more inhomogeneous.

I do not see an issue with the figure, maybe the problem comes from the wording:

As mentioned previously, phase wraps are visible where phase transitions from −π to +π in the phase images and will be discussed in more detail in the next chapter. The phase difference and B0 field maps are also shown. Note that taking the phase difference eliminates the wraps in this example, however, there could be residual wraps when the field is more inhomogeneous.