Effect of photon energy spectrum on dosimetric parameters of brachytherapy sources

Mahdi Ghorbani; Mohammad Mehrpouyan; David Davenport; Toktam Ahmadi Moghaddas

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Effect of photon energy spectrum on dosimetric parameters of brachytherapy sources

Mahdi Ghorbani

Mohammad Mehrpouyan

David Davenport

oraz

Toktam Ahmadi Moghaddas

| 31 mar 2016

Radiology and Oncology

Tom 50 (2016): Zeszyt 2 (June 2016)

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Article Category: Research Article

Data publikacji: 31 mar 2016

Zakres stron: 238 - 246

Otrzymano: 02 lis 2015

Przyjęty: 29 sty 2016

DOI: https://doi.org/10.1515/raon-2016-0019

Słowa kluczowe
photon energy spectrum, brachytherapy, TG-43 dosimetric parameters, dose distribution

© 2016 Radiol Oncol

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

2D anisotropy function values for (A) 125I, (B) 103Pd, (C) 169Yb and (D) 192Ir sources at r = 0.5 cm (a), 5.0 cm (b), and 15.0 cm (c) distances.

Percentage differences (%) between the 2D anisotropy function obtained from National Nuclear Data Center (NNDC) and other references of energy spectra for (A) 125I, (B) 103Pd, (C) 169Yb, and (D) 192Ir sources.

Isodose curves for (A) 125I, (B) 103Pd, (C) 169Yb, and (D) 19 2Ir sources obtained by different photon energy spectra. The contours for various spectra are not clearly distinguishable due to their overlapping.

Air kerma strength, dose rate constant, and dose rate at 1 cm for 125I, 103Pd, 169Yb, and 192Ir sources based on different photon energy spectra reported by other studies, LBNL, and NNDC databases

Source	Other studies^{1, 16-18}	LBNL¹⁹	NNDC^20-23	Diff. (%) Other study-NNDC	Diff. (%) LBNL-NNDC
Source	Air kerma strength (cGycm2/h)
¹²⁵I	1.035	1.169	1.121	-7.67	4.28
¹⁰³Pd	1.132	1.428	1.404	-19.37	1.71
¹⁶⁹Yb	1.094	1.094	1.097	-0.27	-0.27
¹⁹²Ir	3.622	3.631	3.496	3.60	3.86
	Dose rate constant (cGy/hU)
¹²⁵I	1.115	0.961	1.013	10.07	-5.13
¹⁰³Pd	0.830	0.658	0.669	24.06	-1.64
¹⁶⁹Yb	1.222	1.226	1.222	0.00	0.33
¹⁹²Ir	1.117	1.117	1.117	0.00	0.00
	Dose rate at 1 cm (cGy/hmCi)
¹²⁵I	1.154	1.123	1.136	1.60	-1.07
¹⁰³Pd	0.939	0.940	0.939	0.00	0.09
¹⁶⁹Yb	1.338	1.341	1.341	-0.23	0.00
¹⁹²Ir	4.045	4.054	3.904	3.59	3.84

Radial dose function for 125I, 103Pd, 169Yb, and 192Ir sources based on different photon energy spectra reported by other studies1,16-18, Lawrence Berkeley National Laboratory (LBNL)19, and National Nuclear Data Center (NNDC)20-23 databases

Source	r (cm)	Other studies (A)	LBNL (B)	NNDC (C)	Diff. (%) A-C	Diff. (%) B-C	Source	Other studies (A)	LBNL (B)	NNDC (C)	Diff. (%) A-C	Diff. (%) B-C Pd
¹²⁵I	0.5	0.996	0.996	0.996	0.00	0.00	¹⁰³Pd	1.196	1.196	1.196	0.00	0.00
	1	1.000	1.000	1.000	0.00	0.00		1.000	1.000	1.000	0.00	0.00
	1.5	0.955	0.955	0.954	0.11	0.10		0.789	0.789	0.789	0.00	0.00
	2	0.890	0.890	0.890	0.00	0.00		0.609	0.609	0.608	0.16	0.16
	2.5	0.816	0.815	0.816	0.00	-0.12		0.465	0.465	0.464	0.22	0.22
	3	0.740	0.740	0.740	0.00	0.00		0.352	0.352	0.352	0.00	0.00
	3.5	0.667	0.666	0.667	0.00	-0.15		0.265	0.265	0.264	0.38	0.38
	4	0.596	0.596	0.595	0.17	0.17		0.199	0.199	0.198	0.50	0.51
	4.5	0.530	0.530	0.530	0.00	0.00		0.150	0.150	0.149	0.67	0.68
	5	0.470	0.469	0.470	0.00	-0.21		0.112	0.112	0.112	0.00	0.00
	5.5	0.415	0.415	0.415	0.00	0.00		0.084	0.084	0.083	1.20	1.21
	6	0.365	0.365	0.365	0.00	0.00		0.063	0.062	0.062	1.61	0.00
	6.5	0.320	0.319	0.319	0.31	0.00		0.047	0.047	0.047	0.00	0.00
	7	0.279	0.279	0.279	0.00	0.00		0.035	0.035	0.035	0.00	0.00
	10	0.120	0.120	0.120	0.00	0.00		0.0066	0.0066	0.0065	1.54	1.54
	15	0.029	0.029	0.029	0.00	0.00		0.0010	0.0010	0.0010	0.00	0.00
¹⁶⁹Yb	0.5	0.950	0.949	0.951	-0.11	-0.21	¹⁹²Ir	0.996	0.996	0.996	0.00	0.00
	1	1.000	1.000	1.000	0.00	0.00		1.000	1.000	1.000	0.00	0.00
	1.5	1.042	1.041	1.041	0.10	0.00		1.003	1.003	1.003	0.00	0.00
	2	1.079	1.079	1.077	0.19	0.19		1.006	1.006	1.006	0.00	0.00
	2.5	1.113	1.111	1.110	0.27	0.09		1.008	1.008	1.008	0.00	0.00
	3	1.136	1.137	1.133	0.27	0.35		1.010	1.010	1.009	0.10	0.10
	3.5	1.157	1.156	1.155	0.17	0.09		1.011	1.011	1.010	0.10	0.01
	4	1.169	1.171	1.168	0.09	0.26		1.011	1.011	1.010	0.10	0.10
	4.5	1.183	1.181	1.180	0.25	0.09		1.010	1.010	1.010	0.00	0.00
	5	1.189	1.185	1.185	0.34	0.00		1.008	1.008	1.007	0.10	0.10
	5.5	1.193	1.191	1.191	0.17	0.00		1.005	1.005	1.005	0.00	0.00
	6	1.195	1.189	1.190	0.42	-0.08		1.002	1.002	1.001	0.10	0.10
	6.5	1.189	1.185	1.186	0.25	-0.08		0.998	0.998	0.998	0.00	0.00
	7	1.182	1.181	1.181	0.09	0.00		0.995	0.994	0.994	0.10	0.00
	10	1.089	1.091	1.090	-0.09	0.09		0.949	0.949	0.949	0.00	0.00
	15	0.860	0.865	0.862	-0.23	0.35		0.836	0.836	0.835	0.12	0.12

Information on photon energy spectra of the 125I and 103Pd, 169Yb, and 192Ir radionuclides reported by different databases

	¹²⁵I			103Pd
Reference	TG-43 U1¹	LBNL¹⁹	NNDC²⁰	Rivard¹⁶	LBNL¹⁹	NNDC²¹
Energy range (keV)	27.202-35492	3.335-35.4919	3.77-35.4925	22.074-497.054	2.377-497.08	2.7-487.08
Total photons per disintegration	1.4757	1.60482	1.5767	0.7713825	0.851569801	0.857582605
Average energy (keV)	28.370	27.541	26.059	21.319	19.038	18.889
	¹⁶⁹Yb			192Ir
Reference	Cazeca et al.17	LBNL¹⁹	NNDC²²	Medich and Munro¹⁸	LBNL¹⁹	NNDC²³
Energy range (keV)	49.77-307.74	6.341-781.64	7.18-781.64	61.49-884.54	7.822-1378.3	9.44-1378.50
Total photons per disintegration	3.322	3.779	3.771	2.301	2.359	2.214
Average energy (keV)	92.797	82.622	82.781	354.356	346.736	369.525

eISSN:: 1581-3207
Język:: Angielski

Częstotliwość wydawania:: 4 razy w roku
Dziedziny czasopisma:: Medicine, Clinical Medicine, Radiology, Internal Medicine, Haematology, Oncology

Kanał RSS czasopisma

Effect of photon energy spectrum on dosimetric parameters of brachytherapy sources

Article Category: Research Article

Data publikacji: 31 mar 2016

Zakres stron: 238 - 246

Otrzymano: 02 lis 2015

Przyjęty: 29 sty 2016

DOI: https://doi.org/10.1515/raon-2016-0019

Słowa kluczowephoton energy spectrum, brachytherapy, TG-43 dosimetric parameters, dose distribution

© 2016 Radiol Oncol

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Air kerma strength, dose rate constant, and dose rate at 1 cm for 125I, 103Pd, 169Yb, and 192Ir sources based on different photon energy spectra reported by other studies, LBNL, and NNDC databases

Radial dose function for 125I, 103Pd, 169Yb, and 192Ir sources based on different photon energy spectra reported by other studies1,16-18, Lawrence Berkeley National Laboratory (LBNL)19, and National Nuclear Data Center (NNDC)20-23 databases

Information on photon energy spectra of the 125I and 103Pd, 169Yb, and 192Ir radionuclides reported by different databases

Słowa kluczowe
photon energy spectrum, brachytherapy, TG-43 dosimetric parameters, dose distribution