Katja — the 24^th week of virtual pregnancy for dosimetric calculations

Abstract

Virtual human models, a.k.a. voxel models, are currently the state of the art in radiation protection for computing organ irradiation doses without difficult or morally unfeasible experiments. They are based on medical image data of human patients and offer a realistic, three dimensional representation of human anatomy.We present our newest voxel model Katja, a virtual woman in the 24 th week of pregnancy. Katja integrates two previous voxel models, one obtained from the abdominal MRI scan of a pregnant patient and an already segmented model of a non-pregnant woman. The latter is the ICRP-AF, fitting the reference values for standard height, weight and organ masses given by the Internationals Committee of Radiological Protection (ICRP). The dataset was altered in order to fit the segmented foetus taken from the abdominal MRI scan. The resulting pregnant woman model, Katja, complies with the ICRP reference values for the adult female.

Influence of pregnancy stage and fetus position on the whole-body and local exposure of the fetus to RF-EMF

“…The easiest way to develop a full body pregnant woman model is to insert UFUs in a non-pregnant body envelope. Few numerical heterogeneous pregnant woman models exist and those that do exist were used for EMF exposure studies (Dimbylow 2006, Xu et al 2007, Nagaoka et al 2007, Nagaoka et al 2008b, Becker et al 2008. These models are, however, very specific to the fetus inserted inside the model.…”

New wideband textile antenna for SAR investigation in head microwave imaging

“…The head model represents the property of a female adult [6]. The antenna is first simulated and measured in free space to determine reflection coefficient magnitudes, S11 and the operating bandwidth.…”

Patient-Specific Computational Model and Dosimetry Calculations for PET/CT of a Patient Pregnant with Twins

“…Our standardized pregnant female model with twins at the 25th wk of gestation was based on the International Commission on Radiological Protection (ICRP) computational pregnant female phantom at the 25th wk of gestation (17), which was developed using the mother torso and internal organs of the Rensselaer Polytechnic Institute phantoms (RPI-P) (25), the fetal and mother numeric models of Telecom ParisTech (26), the Katja model (27), and the newborn model of Helmholtz Zentrum München (28). The 25th-wk twins phantom was based on the fetal and mother numeric models and the Katja model.…”