Infants and young children modeling method for numerical dosimetry studies: application to plane wave exposure. (27th January 2016)

• Record Type: Journal Article
• Authors: Dahdouh, S; Varsier, N; Nunez Ochoa, M A; Wiart, J; Peyman, A; Bloch, I
• Is Part Of: Physics in medicine & biology. Volume 61:Number 4(2016:Feb.)
• Page Start: 1500
• Page End: 1514
• Publication Date: 2016-01-27
• Subjects: infants modeling -- anatomy transfer -- numerical dosimetry -- plane wave exposure; Biophysics -- Periodicals; Medical physics -- Periodicals; 610.153
• DOI: 10.1088/0031-9155/61/4/1500
• Languages: English
• ISSNs: 0031-9155

Abstract

Abstract: Numerical dosimetry studies require the development of accurate numerical 3D models of the human body. This paper proposes a novel method for building 3D heterogeneous young children models combining results obtained from a semi-automatic multi-organ segmentation algorithm and an anatomy deformation method. The data consist of 3D magnetic resonance images, which are first segmented to obtain a set of initial tissues. A deformation procedure guided by the segmentation results is then developed in order to obtain five young children models ranging from the age of 5 to 37 months. By constraining the deformation of an older child model toward a younger one using segmentation results, we assure the anatomical realism of the models. Using the proposed framework, five models, containing thirteen tissues, are built. Three of these models are used in a prospective dosimetry study to analyze young child exposure to radiofrequency electromagnetic fields. The results lean to show the existence of a relationship between age and whole body exposure. The results also highlight the necessity to specifically study and develop measurements of child tissues dielectric properties.