The current isoplane correction is 1.96614. Where I got this number is unclear. Updated varian documenation of the MLC maintenance guide provides a value of 1.96078 (pg135). Pylinac should use this number instead. The difference is <0.3% and should not affect gamma calculations, but would slightly affect calculations that compared against the TPS.
The current isoplane correction is 1.96614. Where I got this number is unclear. Updated varian documenation of the MLC maintenance guide provides a value of 1.96078 (pg135). Pylinac should use this number instead. The difference is <0.3% and should not affect gamma calculations, but would slightly affect calculations that compared against the TPS.