| Presentation | 2010-07-09 A numerical calculation method to estimate thermal noise generated from biological objects by using Monte-Carlo simulation Tatsuya YAMASHITA, Takenori OIDA, Shoji HAMADA, Tetsuo KOBAYASHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | MR images demand a high signal-to-noise ratio (SNR). For estimating a SNR of MR images, calculation of thermal noise, one of the main causes of decline in SNR, is important. Conventionally, Johnson-Nyquist noise from biological objects has been calculated by applying analysis formula to axially symmetric system, or by calculating 3D field numerically when the system is not axially symmetric. In this study, we proposed a new method of calculating thermal noise. We represented biological object with cubic voxels and calculated thermal noise by using Monte-Carlo simulation, assuming each voxel has a current element, current distribution of which is described by Maxwell-Boltzmann distribution. We examined validity of the proposed method by comparing results of conventional and the proposed methods for simple, axial symmetric models. By using the proposed method, we are now able to calculate thermal noise generated from a model of biological object in non-axially symmetric system. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | MR image / thermal noise / SNR |
| Paper # | MBE2010-16 |
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| Conference Information | |
| Committee | MBE |
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| Conference Date | 2010/7/2(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | ME and Bio Cybernetics (MBE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A numerical calculation method to estimate thermal noise generated from biological objects by using Monte-Carlo simulation |
| Sub Title (in English) | |
| Keyword(1) | MR image |
| Keyword(2) | thermal noise |
| Keyword(3) | SNR |
| 1st Author's Name | Tatsuya YAMASHITA |
| 1st Author's Affiliation | Graduate School of Engineering, Kyoto University() |
| 2nd Author's Name | Takenori OIDA |
| 2nd Author's Affiliation | Graduate School of Engineering, Kyoto University |
| 3rd Author's Name | Shoji HAMADA |
| 3rd Author's Affiliation | Graduate School of Engineering, Kyoto University |
| 4th Author's Name | Tetsuo KOBAYASHI |
| 4th Author's Affiliation | Graduate School of Engineering, Kyoto University |
| Date | 2010-07-09 |
| Paper # | MBE2010-16 |
| Volume (vol) | vol.110 |
| Number (no) | 120 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |