TABLE 1.

Analysis of PD and ArcCHECK plan‐specific QA at the Halcyon linac

	Portal dosimetry			ArcCHECK
QA criterion	γ2%/2 mm	γ2%/1 mm	γ1%/1 mm	γ3%/3 mm	γ3%/2 mm	γ2%/2 mm
Total average [%]	99.90	96.64	91.87	99.34	98.62	95.81
Standard deviation [%]	0.15	1.67	2.56	1.58	2.55	4.72

Besides the total average gamma passing rate for all studied Gamma criteria the standard deviation is supplied. All stated values represent absolute and global gamma passing rates (10% low dose threshold).