Best Medical International Inc 2301 Dosimetry Datasets

Note: The following tables are adapted from Rivard et al., Med. Phys. 31, 633-674 (2004).

Table I. NIST standard WAFAC calibration dates for air kerma strength for each manufacturer, and dose rate constant values. Note that for a given source type, the % change in Λ from the 1999 value is different for different seed models.

Manufacturer	Source Type	NIST date used by ADCL and NIST as standard	consensusΛ[cGy -h·-1·U-1]	% difference in Λ from 1999 value
Best Medical International Inc 2301	125I	April 18, 2000	1.018	+3.3%

Table II.Consensus g(r) values

r[cm]	0.10	0.15	0.25	0.50	0.75	1.00	1.50	2.00	3.00	4.00	5.00	6.00	7.00	8.00	9.00	10.00
Line source approximation L=4.0	1.033	1.029	1.027	1.028	1.030	1.000	0.938	0.866	0.707	0.555	0.427	0.320	0.248	0.187	0.142	0.103
Point source approximation	0.579	0.725	0.878	0.991	1.020	1.000	0.945	0.875	0.715	0.562	0.432	0.327	0.251	0.189	0.144	0.104

Table III. F(r,θ)

Polar angleθ (degrees)

		0	5	10	20	30	40	50	60	70	80	Φan(r)
r [cm]	1	0867	0.724	0.653	0.785	0.900	0.982	1.014	1.030	1.036	1.010	0.986
	2	0.854	0.720	0.671	0.794	0.890	0.954	0.992	1.010	1.026	1.030	0.976
	3	0.922	0.726	0.699	0.809	0.885	0.947	0.985	1.009	1.016	1.019	0.968
	4	0.902	0.738	0.727	0.814	0.892	0.939	0.991	1.007	1.023	1.017	0.971
	5	0.894	0.753	0.732	0.825	0.899	0.943	0.997	1.010	1.011	1.010	0.969
	6	0.893	0.771	0.764	0.852	0.915	0.976	0.989	1.019	1.035	1.020	0.991
	7	0.858	0.800	0.782	0.821	0.873	0.937	0.961	1.002	1.010	1.005	0.969

Table IV. Dose rates (cGy · h-1 · U-1) as a function of distance for Best Medical 2301 brachytherapy sources using the 1-D dosimetry formalism of Eq. (11) with interpolation for gL(r) and fan(r).

r (cm)	0.5	1.0	1.5	2.0	3.0	4.0	5.0	6.0	7.0
	3.978	1.004	0.419	0.217	0.0783	0.0347	0.0171	0.00908	0.00506