Program Information
Development of the Computational Human Thoracic Phantom and Estimation of the Organ Absorbed Dose in the Chest Radiography Using Monte Carlo Simulation
N Sato*, T Fujibuchi , H Yabuuchi , Kyushu University, Fukuoka City, Fukuoka
Presentations
SU-I-GPD-I-2 (Sunday, July 30, 2017) 3:00 PM - 6:00 PM Room: Exhibit Hall
Purpose: To develop the computational human thoracic phantom using CT(computed tomography) data of the children in order to evaluate the organ absorbed dose in the chest radiography, and calculate the organ absorbed dose with Monte Carlo simulation. The organ absorbed dose regarding the difference of the number of tetrahedron is also compared.
Methods: First of all, to create the computational human thoracic phantom, the CT data of 2 years old female was obtained and the region of the thorax was segmented. After that, segmented data was output as a 3 dimensional data and converted to the polygon data in order to adjust the organ configuration and smooth the organ surface. Additionally, this polygonal data was used to create a tetrahedral mesh phantom using TetGen software. Finally, the tetrahedral mesh phantom was incorporated into the Monte Carlo code PHITS that has been developed by the Japan Atomic Energy Agency to calculate the organ absorbed dose. The number of tetrahedron was varied arbitrarily by using TetGen and compared the value of the organ absorbed dose for each number of tetrahedral mesh phantom.
Results: The computational human thoracic phantom was successfully developed. The organ absorbed dose could be calculated by using the phantom which was consisted of tetrahedron. The value of organ absorbed dose was compared and the results show that there are little differences in each tetrahedral mesh phantom.
Conclusion: The computational human thoracic phantom consisted of tetrahedron was developed and organ absorbed dose was calculated. Also the organ absorbed dose was compared and indicated that the number of tetrahedron was not related to the calculated results.
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