Table 5.

Response to survey questions: 3d/volumetric analysis secondary questions for passing criteria for gamma analysis.

		Gamma distance‐to‐agreement
		2 mm	3 mm	4 mm	5 mm
Gamma dose percent difference	1%	0.0% (0)*	0.3% (1)	0.0% (0)	0.0% (0)
	2%	5.4% (21)*	0.5% (2)	0.0% (0)	0.0% (0)
	3%	3.6% (14)*	84.1% (329)	0.0% (0)	0.5% (2)
	4%	0.0% (0)	0.0% (0)	0.8% (3)	0.0% (0)
	5%	0.0% (0)	1.5% (6)	0.0% (0)	0.5% (2)

The gamma distance‐to‐agreement ranged from 2 to 5 mm while the gamma dose percent difference ranged from 1 to 5%. Percentage based on number of sites that provided answers for the criteria (N = 391). *Acceptable criteria based on recommendations for TG‐218.