Development of a pregnant woman phantom using polygonal mesh, for dosimetric evaluations

Authors

  • Manuela Ohana Monteiro Cabral 1. Universidade Federal de Pernambuco, Departamento de Energia Nuclear
  • José Wilson Vieira 1. Escola Politécnica de Pernambuco 2. Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco
  • Viriato Leal Neto 1. Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco
  • Fernando Roberto de Andrade Lima 1. Centro Regional de Ciências Nucleares do Nordeste

DOI:

https://doi.org/10.15392/bjrs.v3i1A.127

Keywords:

Exposure Computational Models, EGSnrc, Voxel phamtoms, Monte Carlo.

Abstract

Due to the embryo/fetus radiosensitivity the accurate estimation of the absorbed dose distribution in the abdominal area is an additional problem caused by the exposure of pregnant women to ionizing radiation in medical applications. This paper reports the construction and insertion of a fetal representation in a female geometry by means of 3D modeling techniques. In order to characterize an ECM the Grupo de Dosimetria Numerica (GDN) is using, mainly, simulators emitting gama sources and voxel phantoms coupled to a MC code. The phantoms are predominantly constructed from stacks of magnetic resonance images (MRI), computed tomography (CT) (obtained from scans of real patients) or from 3D modeling techniques. Due to the difficulty of obtaining medical images of pregnant women, 3D objects in several formats (.obj, .max, .blend, etc.) were acquired for anatomical representation of a non-pregnant adult. To construct a fetal representation, the 3D modeling technique called Poly Modeling (polygon mesh) was used inside of the software Autodesk 3ds Max 2014 (free student version). Information about the radiosensibility of organs included in the abdominal area will be used to fit and use the pregnant phantom in numerical dosimetry. For this, the phantom will be voxelized and the masses of organs of interest will be adjusted according to data provided by International Commission on Radiological Protection (ICRP). Finally, the phantom will be coupled to a MC code creating a MCE that will serve as base for the construction of several other models involving pregnant women submitted to ionizing radiation.

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References

XU, X. G.; ECKERMAN, K. F. Handbook of Anatomical Models for Radiation Dosimetry. Series in Medical Physics and Biomedical Engineering. Boca Raton, London, New York: CRC Press/Taylor & Francis Group, 2009, 760 p.

RUSSO, M., “Polygonal Modeling: Basic and Advanced Techniques”. Jones & Bartlett Publishers, 2005.

ICRP - International Commission on Radiological Protection. Basic anatomical and physiological data for use in radiological protection reference values. ICRP Publication 89. Ann. ICRP 32 (3-4), 2002, 279 p.

AUTODESK. 3DS MAX 2014 | HELP. Autodesk Creative Commons FAQ. Avaible at: <http://help.autodesk.com/view/3DSMAX/2015/ENU/>. Last acess in: 11 out. 2014.

CABRAL, M. O. M. Desenvolvimento de um Modelo Computacional de Exposição para uso em avaliações dosimétricas em gestantes. Masterdegree dissertation, PROTEN, UFPE, Recife, Pernambuco, 2015, 92 p.

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Published

2015-05-21

How to Cite

Cabral, M. O. M., Vieira, J. W., Leal Neto, V., & Andrade Lima, F. R. de. (2015). Development of a pregnant woman phantom using polygonal mesh, for dosimetric evaluations. Brazilian Journal of Radiation Sciences, 3(1A (Suppl.). https://doi.org/10.15392/bjrs.v3i1A.127

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