Table 4.

Dose increase factor (DIF) assigned to neutron contamination in a 15 MV photon beam produced by four prostheses: Co‐Cr‐Mo, Stainless steel, Ti‐alloy, and Ti in a water phantom

		Dose Increase Factor (DIF) ± Uncertainty
	Depth in Phantom (cm)	Co‐Cr‐Mo	Stainless Steel	Ti‐alloy	Ti
	1	$1.05\pm 0.11$	$1.02\pm 0.10$	$1.04\pm 0.10$	$1.06\pm 0.10$
	2	$1.04\pm 0.10$	$1.00\pm 0.09$	$1.01\pm 0.09$	$1.04\pm 0.10$
	3	$1.03\pm 0.10$	$0.97\pm 0.10$	$0.96\pm 0.09$	$1.01\pm 0.10$
	4	$0.99\pm 0.11$	$0.92\pm 0.10$	$0.90\pm 0.09$	$0.96\pm 0.10$
Water	5	$1.05\pm 0.12$	$0.93\pm 0.11$	$0.84\pm 0.10$	$0.98\pm 0.11$
	6	$1.71\pm 0.19$	$1.37\pm 0.17$	$0.99\pm 0.12$	$1.09\pm 0.14$
	7	$5.85\pm 0.61$	$4.58\pm 0.55$	$1.90\pm 0.23$	$2.17\pm 0.27$
	8	$36.85\pm 4.12$	$26.27\pm 3.16$	$8.05\pm 0.96$	$9.09\pm 1.08$
	9	$184.55\pm 21.80$	$137.33\pm 18.75$	$40.66\pm 4.93$	$43.17\pm 5.20$
	11	$2197.63\pm 298.29$	$1593.77\pm 228.52$	$468.48\pm 63.86$	$524.81\pm 71.4$
Prosthesis	12	$1229.37\pm 171.61$	$925.15\pm 132.63$	$277.89\pm 38.96$	$311.25\pm 43.58$
	13	$1729.75\pm 247.97$	$1347.23\pm 105.44$	$422.54\pm 40.84$	$471.48\pm 67.80$
	15	$138.49\pm 10.99$	$110.58\pm 16.92$	$36.86\pm 3.06$	$40.77\pm 3.37$
	16	$31.05\pm 4.79$	$23.49\pm 3.62$	$8.49\pm 1.36$	$9.49\pm 1.51$
	17	$8.84\pm 1.39$	$6.68\pm 1.20$	$2.25\pm 0.38$	$2.63\pm 0.44$
	18	$2.86\pm 0.53$	$2.17\pm 0.42$	$0.93\pm 0.19$	$1.15\pm 0.23$
Water	19	$0.94\pm 0.19$	$0.88\pm 0.17$	$0.58\pm 0.13$	$0.79\pm 0.18$
	20	$0.39\pm 0.08$	$0.71\pm 0.16$	$0.60\pm 0.12$	$0.49\pm 0.11$
	21	$0.40\pm 0.10$	$0.71\pm 0.18$	$0.46\pm 0.12$	$0.49\pm 0.13$
	22	$0.83\pm 0.26$	$0.45\pm 0.13$	$0.49\pm 0.15$	$0.46\pm 0.15$