| Project/Area Number |
10670873
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Radiation science
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| Research Institution | Hosei University |
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Principal Investigator |
OGAWA Koichi Hosei University, Faculty of Enginnering, Professor, 工学部, 教授 (00158817)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
|
| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1998: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | Monte Carlo simulation / Image processing / Object description / Single photon emission CT / Rediation therapy / Rectangular region / 光子輸送 / モンテカルロ計算 / 物体表現 |
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| Research Abstract |
The photon transportation simulation which uses a Monte Carlo method is an indispensable techinique for examining the scatter and absorption correction methods in diagnosis with SPECT and PET or radiation therapy. We have developed a method for object description in maximum regions (maximum rectangular regions : MRRs) to speed up photon transportation simulation, and compared the calcuylation time with that of conventional object description methods. In this research details of the expansion of MRR to three dimensions are developed. Moreover, the effectiveness of proposed method was compared with the VB and octree method in the results of simulations of two kinds of phantoms. This object description method could secure larger areas than the octree method. In the simulation result obtained by MRR expression, the calculation time was able to made shorter than with conventional expressions such as by VB and octree.
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