Description of the DLC-99/HUGO package of photon interaction data in ENDF/B-V format

Roussin, R.W.; Knight, Jack; Hubbell, J.H.; Howerton, R.J.

doi:10.2172/5509107

Cited by 43 publications

(16 citation statements)

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“…The uncertainty of the underlying cross-section library is dominated by the uncertainty of the photoionization cross sections, estimated to be about 2%, 32 resulting in an estimated uncertainty of 1%-2% in the total linear attenuation coefficient, tot , in the 125 I energy range. The dosimetric effects of cross-section data uncertainty can be estimated by performing point source simulations with two different cross-section libraries 14,33 differing by known amounts. For a 30 keV source, a 1.5% uncertainty in tot for water results in dose-rate uncertainties of 1.2% and 4.5% at 1 and 5 cm, respectively.…”

Section: Task Group 43 Dose-calculation Formalismmentioning

confidence: 99%

Dosimetric characteristics of the DRAXIMAGE model LS‐1 I‐125 interstitial brachytherapy source design: A Monte Carlo investigation

Williamson

2002

Medical Physics

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(Received 5 June 2001; accepted for publication 26 December 2001; published 19 March 2002) We have used Monte Carlo photon transport simulations to evaluate dosimetric characteristics of a new 125I seed, the DRAXIMAGE BrachySeed (model LS-1) source for interstitial brachytherapy and to calculate the dosimetric parameters recommended by the AAPM Task Group 43 (TG-43). To eliminate thick end welds, preformed closed-ended Ti shells are welded together near the transverse plane. The radioactivity is localized near the seed ends in order to maximize isotropy at typical prescription distances. Transmission radiography reveals that its internal components can move by as much as 200 microm under the influence of gravitational forces affecting the dose-rate constant and relative dose distribution by as much as 5% and 10%, respectively. However, the clinical dose distribution can be well represented by a weighted average of dose distributions corresponding to three different orientation-dependent internal geometry configurations. This average dose distribution agrees closely (within 1% at 1 cm) with that derived from the geometry specified by the vendor model (seed components uniformly spaced), from which the recommended relative dosimetry parameters were derived. An average dose-rate constant of 0.935 cGy h(-1) U(-1) is recommended for clinical application and values of 0.919, 0.963, and 0.920 for vertical orientation, horizontal orientation, and the vendor specified geometries, respectively. The NIST wide-angle free-air chamber realization of the air-kerma strength primary standard, SKN99, was explicitly simulated. We show that the output of Ag characteristic x rays is about half that of the model 6711 source resulting in a relative dose distribution between that of the model 6711 source and pure 125I x-ray emitters. Finally, it is demonstrated that the TG-43 point-source formalism more accurately estimates solid-angle weighted dose at small distances if one uses a radial dose function data prepared using a point-source, rather than line-source, geometry factor.

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Section: Task Group 43 Dose-calculation Formalismmentioning

confidence: 99%

Dosimetric characteristics of the DRAXIMAGE model LS‐1 I‐125 interstitial brachytherapy source design: A Monte Carlo investigation

Williamson

2002

Medical Physics

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“…9 MABDOSE uses the DLC-99 library, updated in 1983. 10 With regard to the validation of specific absorbed fractions for Reference Man organs, correspondence between MABDOSE and the Cristy-Eckerman data is dependent on both organ geometry correspondence and accuracy of radiation transport. Selecting the adult male reference phantom as the basis for comparison is not all inclusive: the possible combinations represented by six different phantoms in male and female varieties, having one of four different voxel resolutions, with one of 20 possible source organs, make an exhaustive comparison time consuming, and the generated data voluminous and of questionable value.…”

Section: Valuesmentioning

confidence: 99%

MABDOSE. II: Validation of a general purpose dose estimation code

1999

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“…10 This library is an elemental cross-section database; cross sections for composite materials ͑i.e., soft tissue, lung, and bone͒ are constructed using a mass-weighted average of the interaction coefficients for the media's constituent atoms. 11,12 The compositions for soft tissue, lung, and bone used by MABDOSE are those specified by Cristy and Eckerman.…”

Section: Simulation: Cross-section Lookup Tablesmentioning

confidence: 99%

MABDOSE. I: Characterization of a general purpose dose estimation code

1999

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The MABDOSE software represents a general tool to perform internal radiation dosimetry. It uses a three-dimensional lattice in which to conduct radiation transport, scoring energy deposition in discrete voxels. The dosimetry system currently relies on the same algorithm used by the MIRD committee for photon transport, and assumes local deposition of particulate energy. A mathematical description of the dosimetry system's implementation is given. Additionally, a characterization of the system with respect to memory requirements, data libraries used, and simulation timing benchmarks, is presented. Validation of the software is presented in a companion manuscript.

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Description of the DLC-99/HUGO package of photon interaction data in ENDF/B-V format

Cited by 43 publications

References 0 publications

Dosimetric characteristics of the DRAXIMAGE model LS‐1 I‐125 interstitial brachytherapy source design: A Monte Carlo investigation

Dosimetric characteristics of the DRAXIMAGE model LS‐1 I‐125 interstitial brachytherapy source design: A Monte Carlo investigation

MABDOSE. II: Validation of a general purpose dose estimation code

MABDOSE. I: Characterization of a general purpose dose estimation code

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