TABLE 1.

Values of SF ₂ (Surviving Fraction at 2 Gy), MID, SER, and DEF _40% (dose enhancement factor at 40% surviving fraction) for MDA‐MB‐231 cells treated at two concentrations of 15 nm Aurovist™ AuNPs and three qualities of X‐rays

X‐ray beam quality	15 nm AuNP concentration	SF 2	MID	SER	DEF 40%
100 kV	0 μg/mL	0.36 ± 0.03	1.26	1.00
	100 μg/mL (4.87 nM)	0.30 ± 0.03	1.16	1.10	1.17 ± 0.08
	200 μg/mL (9.74 nM)	0.28 ± 0.01	1.05	1.20	1.34 ± 0.02
190 kV	0 μg/mL	0.30 ± 0.02	1.26	1.00
	100 μg/mL (4.87 nM)	0.23 ± 0.01	1.16	1.08	1.15 ± 0.06
	200 μg/mL (9.74 nM)	0.18 ± 0.01	1.05	1.20	1.33 ± 0.06
6 MV	0 μg/mL	0.36 ± 0.04	1.10	1.00
	200 μg/mL (9.74 nM)	0.32 ± 0.03	1.06	1.04	1.14 ± 0.06