Mcnpxs simulation method for hand exposure patient using 3d scanned model of object with free curved surfaces

This study was performed for suggesting a simulation method that can create accurate virtual models of objects with free curved surfaces and perform distortion-free MCNPX simulations. The virtual models acquired by using 3D scan equipment with an accuracy of approximately ±0.025 mm in length, compare with actual objects and are comprised of 11104 polygons. Generally, MCNPX simulations of objects with free curved surfaces are performed through voxelization. In this study, polygon model be tetrahedralized by TetGen for the construction of MCNPX geometry to distortion-free. Then, dose estimation was successfully performed after converting the virtual model into an MCNPX input. With this in mind, a voxelized model was constructed for comparison purposes. The dose estimation functions of the two models were found to be similar, showing a similar amount of computing time by using the mesh tally option with 2e7 histories: for the tetrahedralized model, 729.67 minutes; for the voxelized model, 720.11 minutes. (authors)