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 HDR 4140 source

Radius / cm	g_L(r) L=0.36 cm	g_p(r)	Unc. %
0.20	0.918	0.755	0.06
0.25	0.927	0.812	0.07
0.30	0.934	0.850	0.08
0.40	0.945	0.897	0.11
0.50	0.955	0.927	0.13
0.60	0.966	0.949	0.16
0.70	0.975	0.964	0.18
0.75	0.978	0.970	0.19
0.80	0.982	0.976	0.21
0.90	0.993	0.990	0.23
1.00	1.000	1.000	0.25
1.25	1.021	1.025	0.06
1.50	1.040	1.047	0.07
1.75	1.057	1.065	0.08
2.00	1.074	1.083	0.09
2.50	1.101	1.111	0.11
3.00	1.119	1.130	0.13
3.50	1.137	1.148	0.15
4.00	1.147	1.159	0.17
4.50	1.157	1.169	0.19
5.00	1.161	1.173	0.21
6.00	1.158	1.170	0.21
7.00	1.140	1.152	0.24
8.00	1.111	1.123	0.28
9.00	1.084	1.096	0.32
10.00	1.047	1.058	0.35
11.00	1.004	1.015	0.13
12.00	0.960	0.970	0.15
13.00	0.913	0.923	0.16
14.00	0.867	0.876	0.18
15.00	0.820	0.829	0.19
16.00	0.776	0.784	0.21
17.00	0.732	0.739	0.23
18.00	0.686	0.693	0.25
19.00	0.644	0.651	0.27
20.00	0.599	0.606	0.30

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
0.20	20.00	-1.6583E-03	9.9794E-03	8.8401E-01	1.9774E-01	-5.8007E-03	6.5259E-05	8.0969E-02

Fitting coefficients for g_L(r) = a₀ + a₁r +a₂r² + a₃r³ +a₄r⁴ + a₅r⁵
Fit range		Coefficients
r_min (cm)	r_max (cm)	a₀	a₁ / cm^-1	a₂ / cm^-2	a₃ / cm^-3	a₄ / cm^-4	a₅ / cm^-5
0.20	20.00	8.9975E-01	1.1554E-01	-1.6002E-02	7.2108E-04	-1.3903E-05	7.7150E-08

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D.W.O. Rogers home page
August 29 2008.