The CLRP TG-43 Parameter Database for Brachytherapy

The CLRP TG-43 Parameter Database
R. E. P. Taylor and D. W. O. Rogers

Radial dose function data for the PharmaSeed BT-125-2 source

Radius / cm	g_L(r) L=0.325 cm	g_p(r)	Unc. %
0.05	1.117	0.441	0.03
0.06	1.071	0.486	0.02
0.07	1.057	0.535	0.02
0.08	1.055	0.583	0.02
0.09	1.057	0.629	0.02
0.10	1.060	0.671	0.02
0.15	1.080	0.830	0.03
0.20	1.088	0.922	0.04
0.25	1.091	0.976	0.05
0.30	1.088	1.006	0.05
0.40	1.081	1.035	0.07
0.50	1.072	1.045	0.09
0.60	1.059	1.043	0.11
0.70	1.046	1.037	0.13
0.75	1.038	1.031	0.13
0.80	1.031	1.026	0.14
0.90	1.015	1.012	0.16
1.00	0.997	0.997	0.00
1.50	0.910	0.915	0.11
2.00	0.814	0.819	0.16
2.50	0.721	0.726	0.21
3.00	0.636	0.641	0.27
3.50	0.556	0.561	0.34
4.00	0.486	0.490	0.41
4.50	0.420	0.423	0.50
5.00	0.363	0.366	0.59
5.50	0.314	0.316	0.35
6.00	0.272	0.274	0.41
6.50	0.233	0.235	0.48
7.00	0.200	0.202	0.55
7.50	0.173	0.174	0.63
8.00	0.146	0.148	0.73
8.50	0.127	0.128	0.83
9.00	0.108	0.109	0.96
9.50	0.0918	0.0926	1.09
10.00	0.0790	0.0796	1.24

Fitting coefficients for g_L(r) = (a₀r^-2 + a₁r^-1 +a₂ + a₃r +a₄r² + a₅r³) e^-a₆r
Fit range		Coefficients
r_min (cm)	r_max (cm)	a₀ / cm²	a₁ / cm	a₂	a₃ / cm^-1	a₄ / cm^-2	a₅ / cm^-3	a₆ / cm^-1
0.05	10.00	4.8089E-04	-1.1519E-02	1.1389E+00	5.0233E-01	2.7405E-03	4.4628E-03	4.9310E-01

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August 29 2008.