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Proceedings Paper

Object description and performance of Monte Carlo simulation in photon transport
Author(s): T. Sato; Koichi Ogawa
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Paper Abstract

Object description is important for performing photon transport efficiently by means of a Monte Carlo method. The description methods include a voxel-based description which represents an object by means of the union of a voxel of the same size and an octree description which describes an object by using cubic regions of several sizes. The octree representation requires fewer regions than the voxel-based description when the object is represented with the same precision. Therefore the octree representation very effectively reduces the calculation time, but the number of regions depends on the coordinate system of the octree representation. We investigated the relationship between the description methods and the performance of the calculation by using each description. We calculated the photon transportation by using the object structure determined in different coordinate systems. The results showed that the calculation speed depends upon the coordinate systems used for representing the phantom even though the number of regions does not change.

Paper Details

Date Published: 29 January 1999
PDF: 6 pages
Proc. SPIE 3584, 27th AIPR Workshop: Advances in Computer-Assisted Recognition, (29 January 1999); doi: 10.1117/12.339827
Show Author Affiliations
T. Sato, Hosei Univ. (Japan)
Koichi Ogawa, Hosei Univ. (Japan)

Published in SPIE Proceedings Vol. 3584:
27th AIPR Workshop: Advances in Computer-Assisted Recognition
Robert J. Mericsko, Editor(s)

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