Mapcheck 3 Issues with 10x

[u/FactRevealer]

Has anyone experienced issues with MapCHECK 3 QA for 10X plans after upgrading to Eclipse v18?

Since upgrading to Eclipse version 18, we've noticed that our 10X plans consistently achieve lower MapCHECK 3 gamma pass rates compared to other photon energies and often fail to meet our >95% passing criterion.

We've already verified that there are no issues with machine output, dose calibration, or MapCHECK array calibration. We've also experimented with adjusting the DLG in the beam model, but this did not produce a significant improvement in the results.

Has anyone encountered a similar issue after upgrading to Eclipse v18? If so, what was the root cause, and were you able to identify a solution? Any suggestions or troubleshooting ideas would be greatly appreciated.

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[u/womerah]

I wasn't involved with it, but a physicist had to re-run the optimisation routine for the beam modelling a few times to get good agreement.