Table 2.

Comparison of neutron source strength for various medical linacs.

Manufacturer	Model	Energy (MeV)	Q (n Gy−1)	Study
Siemens	KD	20	0.92 × 1012	McCall (1987)2
Siemens	Primus	15	0.20 × 1012	Lin et al. (2001)47
Siemens	Primus	15	0.17 × 1012	Pena et al. (2005)26
Siemens	Primus	15	0.136 × 1012	Becker et al. (2007)13
Siemens	MD2	10	0.08 × 1012	Followill et al. (2003)17
Siemens	MD	15	0.2 × 1012	Followill et al. (2003)17
Siemens	KD	18	0.88 × 1012	Followill et al. (2003)17
Siemens	Primus (with MiMIC)	10	0.02 × 1012	Followill et al. (2003)17
Siemens	Primus (with MiMIC)	15	0.12 × 1012	Followill et al. (2003)17
Siemens	Primus (with MLC)	15	0.21 × 1012	Followill et al. (2003)17
Varian	1800C	18	2.9 × 1012	McCall (1987)2
Varian	20C	15	0.93 × 1012	McCall (1987)2
Varian	18C	10	0.059 × 1012	McCall (1987)2
Varian	1800C	18	2.27 × 1012	McGinley and Landry (1989)56
Varian	1800C	15	1.23 × 1012	McGinley and Landry (1989)56
Varian	1800C	10	0.06 × 1012	McGinley and Landry (1989)56
Varian	2100C/2300C	20	1.2 × 1012	Mao et al. (1997)32
Varian	2100C/2300C	18	1.2 × 1012	Mao et al. (1997)32
Varian	2100C/2300C	15	6.8 × 1011	Mao et al. (1997)32
Varian	2100C/2300C	10	3.8 × 1010	Mao et al. (1997)32
Varian	2100C	18	0.96 × 1012	Followill et al. (2003)17
Varian	2100C (with MLC)	18	0.87 × 1012	Followill et al. (2003)17
Varian	2300 CD	18	0.95 × 1012	Followill et al. (2003)17
Varian	2500	24	0.77 × 1012	Followill et al. (2003)17
GE	Saturne 43	25	2.4 × 1012	Fenn and McGinley (1995)58
GE	Saturne 43	18	1.5 × 1012	Fenn and McGinley (1995)58
GE	Saturne 41	15	0.47 × 1012	Fenn and McGinley (1995)58
GE	Saturne 41	12	0.24 × 1012	Fenn and McGinley (1995)58
Elekta	SL-20	17	0.69 × 1012	McGinley et al. (1993)57
Elekta	SL-25	22	2.37 × 1012	McGinley et al. (1993)57
Elekta	SL-20	18	0.46 × 1012	Followill et al. (2003)17
Elekta	SL-25	18	0.46 × 1012	Followill et al. (2003)17