Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Sato, Kaoru; Furuta, Takuya; Takahashi, Fumiaki
no journal, ,
We previously constructed average adult Japanese voxel phantoms (male: JM-103, female: JF-103) and others with various body sizes for application to dose assessment against persons with Japanese physiques. Generally, voxel phantom is not practical tool for dose assessment under various posture conditions, because of long construction term and difficulty of organ deformation. Thus, we are now constructing adult Japanese polygon male (JPM) and female (JPF) phantoms by modifying JM-103 and JF-103. In construction of JPM and JPF, the following processing were performed: (1) extraction of organ surface from JM-103 and JF-103, (2) smoothing organ surface, (3) adjustment of mass, shape and location, (4) multilayering of constructed polygon. Masses of most organs in JPM or JPF agreed with adult Japanese averages within 5%. In future, we will develop the limb operation technique for JPM and JPF. JPM and JPF with the new technique will be used for dose assessment against persons with various postures.
Sato, Kaoru; Furuta, Takuya; Takahashi, Fumiaki
no journal, ,
We are now developing adult Japanese polygon human models (male: JPM and female: JPF) for the purposes of dose assessment of Japanese. At the 2nd joint annual research meeting of JHPS and JRSM, overviews of development of these human models were presented. Thereafter, we performed the improving of the posture change functions and averaging of organ masses and body sizes. In this presentation, we will introduce and explain about the characteristics of posture change functions and physiques of JPM and JPF. In addition, we will show test calculation results of organ doses under various postures.
Sato, Kaoru; Furuta, Takuya
no journal, ,
In retrospective evaluation of exposure doses and risks, it is necessary to consider the individual differences in physiques and organ geometries in addition to exposure conditions. The presenters are now developing deformation functions of the physiques and organ shapes of the adult Japanese male polygon phantom (JPM) for purposes of the retrospective evaluation for individuals. The newly developed deformation functions are as follows: (1) dividing organs of JPM into "Units" composed of several organs based on anatomical information, (2) deforming each "Unit" by using Lattice method, (3) creating "Joint model" by combining the deformed "Units", and (4) reproducing the continuous shape changes of the organs by applying Morph method to "Joint models". The above process made it possible to deform the JPM without generating polygon intersections. The deformed JPM was applicable to the tetrahedralization and radiation transport simulation.