Anisotropy functions for  and  sources

Weaver, Keith A.

doi:10.1118/1.598458

Cited by 68 publications

(60 citation statements)

References 8 publications

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“…Anisotropy factors as a function of radius for several commercially available sources are listed in Table VII. Results from the present work compare favorably with those of previous studies evaluating similar or identical sources, 39 , 40 , 42 …”

Section: Resultssupporting

confidence: 86%

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Dosimetric parameters of three new solid core I‐125 brachytherapy sources

Solberg

DeMarco

Hugo

et al. 2002

J Applied Clin Med Phys

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Monte Carlo calculations and TLD measurements have been performed for the purpose of characterizing dosimetric properties of new commercially available brachytherapy sources. All sources tested consisted of a solid core, upon which a thin layer of normalI125 has been adsorbed, encased within a titanium housing. The PharmaSeed BT‐125 source manufactured by Syncor is available in silver or palladium core configurations while the ADVANTAGE source from IsoAid has silver only. Dosimetric properties, including the dose rate constant, radial dose function, and anisotropy characteristics were determined according to the TG‐43 protocol. Additionally, the geometry function was calculated exactly using Monte Carlo and compared with both the point and line source approximations. The 1999 NIST standard was followed in determining air kerma strength. Dose rate constants were calculated to be 0.955±0.005,0.967±0.005, and 0.962±0.005 cGynormalh−1normalU−1 for the PharmaSeed BT‐125‐1, BT‐125‐2, and ADVANTAGE sources, respectively. TLD measurements were in excellent agreement with Monte Carlo calculations. Radial dose function, g(r), calculated to a distance of 10 cm, and anisotropy function F(r, θ), calculated for radii from 0.5 to 7.0 cm, were similar among all source configurations. Anisotropy constants, trueϕ¯an, were calculated to be 0.941, 0.944, and 0.960 for the three sources, respectively. All dosimetric parameters were found to be in close agreement with previously published data for similar source configurations. The MCNP Monte Carlo code appears to be ideally suited to low energy dosimetry applications.PACS number(s): 87.53.–j

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Section: Resultssupporting

confidence: 86%

“…Additionally, values are consistent with reports on two other commercially available sources (Table VIII). 39 , 40 , 42 …”

Section: Resultsmentioning

confidence: 99%

Dosimetric parameters of three new solid core I‐125 brachytherapy sources

Solberg

DeMarco

Hugo

et al. 2002

J Applied Clin Med Phys

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“…3 shows the variation of the anisotropy function with radial distance in water. The F ( r , θ) of the ADVANTAGE source in water was compared with those of the Model 200 source determined by Weaver, (16) previous work on the ADVANTAGE source determined by Meigooni et al, (12) the NAS MED3633 determined by Li and Palta, (15) and the Best

{}^{103}{Pd}

determined by Meigooni et al (14) (Figs. 4 and 5).…”

Section: Discussionmentioning

confidence: 99%

Monte Carlo dosimetric characterization of the IsoAid ADVANTAGE brachytherapy source

Sowards

2007

J Applied Clin Med Phys

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For roughly 25 years, normalI125 and Pd103 sources have been used in the treatment of various malignant diseases such as prostate cancer. Various new sources have been marketed and produced to meet the demand for new sources to use in treatment. Recently, IsoAID LLC created the ADVANTAGE Pd103 source. Various dosimetric parameters must be determined to facilitate treatment planning using this source. Theoretical determination of dosimetric characteristics, dose rate constant, radial dose function, and anisotropy function for this new source followed the American Association of Physicists in Medicine (AAPM) Task Group 43U1 recommendations. Theoretical calculations were performed in liquid water using the PTRAN Monte Carlo code version 7.44. The radial dose function of the new source was calculated in liquid water at distances up to 10.0 cm, and the anisotropy function, at distances ranging from 0.5 cm to 7.0 cm. The anisotropy factors and anisotropy constant were derived from the anisotropy function. The results in water indicate that the dose rate constant is 0.709±0.014 cGy•normalh−1•normalU−1 and that the anisotropy constant is 0.880±0.040. The dosimetric characteristics of this new source compare favorably with those of other commercially available Pd103 sources.PACS: 87.53.Jw

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“…Fig. 8 shows the comparison of the F ðr; yÞ of the InterSource 125 source with Model 6711 (Weaver, 1998), Model 6702 (Weaver, 1998), IoGold (Wallace and Fan, 1999), and Best (R) 125 I (Meigooni et al, 2000) at a distance of 5 cm.…”

Section: Discussionmentioning

confidence: 99%

Determination of the dosimetric characteristics of InterSource125 Iodine brachytherapy source

Meigooni

Yoe-Sein

Al-Otoom³

et al. 2002

Applied Radiation and Isotopes

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The TG-43 recommended dosimetric characteristics of a new 125 I brachytherapy source have been experimentally and theoretically determined. The measurements were performed in Solid Watert using LiF TLDs. The calculations were performed using Monte Carlo simulations in Solid Watert and water. The measured data were compared with calculated values as well as the reported data in literature for other source designs. The dose rate constant this source in water was 1.0173% cGy h À1 U À1 and the anisotropy constant was 0.956. r

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Anisotropy functions for and sources

Cited by 68 publications

References 8 publications

Dosimetric parameters of three new solid core I‐125 brachytherapy sources

Dosimetric parameters of three new solid core I‐125 brachytherapy sources

Monte Carlo dosimetric characterization of the IsoAid ADVANTAGE brachytherapy source

Determination of the dosimetric characteristics of InterSource125 Iodine brachytherapy source

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