Application of voxel phantoms to study the influence of the heterogeneous distribution of actinides in lungs on in vivo counting using animal experiments

Lamart, Stéphanie; Pierrat, N.; Rateau, S.; Rouit, E.; Carlan, L. de; Dudoignon, N.; Bottlaender, Michel; Meeren, Anne Van der; Franck, Didier

doi:10.1051/radiopro:2006029

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…All the counting efficiencies presented in this work are given in counts per second and per gamma emission. A uniform distribution of 1 Bq of this source in the lungs was input in the MCNP(X) code through the OEDIPE software using an interface developed by Lamart et al (2007). for monitoring of workers of the AREVA NC reprocessing plant installations (La Hague, France) were used for the simulations.…”

Section: Cup Size Modificationmentioning

confidence: 99%

Creation and Use of Adjustable 3d Phantoms: Application for the Lung Monitoring of Female Workers

Farah¹,

Broggio²,

Franck³

2010

Health Physics

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In vivo counting measurements, used for the monitoring of workers with internal contamination risks, are based on the use of calibration physical phantoms. However, such phantoms do not exist for female subjects. Computational calibration using numerical representations, Mesh and non-uniform rational basis spline (NURBS) geometries, was thus considered. The study presented here is focused on the creation of different female thoracic phantoms with various breast sizes and chest girths. These 3D models are used to estimate the radiation attenuation with morphology and the resulting variation of the calibration coefficient of a typical 4-germanium in vivo counting system. A basic Mesh female thoracic phantom was created from the International Commission on Radiological Protection Adult Female Reference Computational Phantom. Using this basic phantom, different chest girths (85, 90, 100, 110, and 120) and cup sizes (A to F) were created representing the most common thoracic female morphologies, as recommended by the available and relevant literature. Variation of breast tissue composition and internal organ volumes with morphology were also considered. As a result, 34 thoracic female phantoms were created combining different cup sizes and chest girths. For the 85 chest girth, at very low energies (15 keV), a relative counting efficiency variation of about 85% was observed between the A and E cups. As a result of this study, breast size dependent calibration coefficients, between 15 keV and 1.4 MeV, were obtained and tabulated for a typical lung counting germanium system.

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Section: Cup Size Modificationmentioning

confidence: 99%

Creation and Use of Adjustable 3d Phantoms: Application for the Lung Monitoring of Female Workers

Farah¹,

Broggio²,

Franck³

2010

Health Physics

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OEDIPE: a new graphical user interface for fast construction of numerical phantoms and MCNP calculations

Franck

Carlan

Pierrat

et al. 2007

Radiation Protection Dosimetry

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Although great efforts have been made to improve the physical phantoms used to calibrate in vivo measurement systems, these phantoms represent a single average counting geometry and usually contain a uniform distribution of the radionuclide over the tissue substitute. As a matter of fact, significant corrections must be made to phantom-based calibration factors in order to obtain absolute calibration efficiencies applicable to a given individual. The importance of these corrections is particularly crucial when considering in vivo measurements of low energy photons emitted by radionuclides deposited in the lung such as actinides. Thus, it was desirable to develop a method for calibrating in vivo measurement systems that is more sensitive to these types of variability. Previous works have demonstrated the possibility of such a calibration using the Monte Carlo technique. Our research programme extended such investigations to the reconstruction of numerical anthropomorphic phantoms based on personal physiological data obtained by computed tomography. New procedures based on a new graphical user interface (GUI) for development of computational phantoms for Monte Carlo calculations and data analysis are being developed to take advantage of recent progress in image-processing codes. This paper presents the principal features of this new GUI. Results of calculations and comparison with experimental data are also presented and discussed in this work.

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Development of the Lung Set for the JAERI Phantom and Evaluation of Counting Efficiencies of a Lung Monitor

Kinase

2008

Jpn. J. Health Phys.

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Application of voxel phantoms to study the influence of the heterogeneous distribution of actinides in lungs on in vivo counting using animal experiments

Abstract: As part of the improvement of calibration techniques for in vivo

Cited by 3 publications

References 10 publications

Creation and Use of Adjustable 3d Phantoms: Application for the Lung Monitoring of Female Workers

Creation and Use of Adjustable 3d Phantoms: Application for the Lung Monitoring of Female Workers

OEDIPE: a new graphical user interface for fast construction of numerical phantoms and MCNP calculations

Development of the Lung Set for the JAERI Phantom and Evaluation of Counting Efficiencies of a Lung Monitor

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