| Presentation | 2005-01-21 Shortening of Processing Time for Phase Unwrapping Procedure With Genetic Algorithm for Phase-Contrast X-Ray CT Naoki SUNAGUCHI, Jin WU, Tohoru TAKEDA, Thet Thet Lwin, Akio YONEYAMA, Tetsuya YUASA, Hidekata HONTANI, Atsushi MOMOSE, Takao AKATSUKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Even for hard X-rays, X-ray phase information allows image formation with higher contrast for such a biological soft tissue, which cannot be sufficiently delineated by conventional absorption-based imaging. To generate projection data from raw fringe pattern images in the process of this CT image reconstruction procedures, frequently 2π-phase jump must be corrected, i.e., the phase unwrapping. However, it is difficult to obtain the satisfactory corrections for noisy fringe pattern images. In previous attempt, regarding the phase unwrapping as a combinatorial optimization, we have proposed a robust phase-unwrapping algorithm for phase-contrast X-ray CT by using genetic algorithm. However, the cost of calculation has the severe problem, because it takes several hours. Here, we have proposed an improvement of GA procedure for shortening of processing time by applying these procedure on divided local area. The validity of this method is demonstrated and discussed experimentally. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Phase contrast / X-ray CT / phase unwrapping / genetic algorithm / processing time |
| Paper # | MI2004-61 |
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| Conference Information | |
| Committee | MI |
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| Conference Date | 2005/1/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Medical Imaging (MI) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Shortening of Processing Time for Phase Unwrapping Procedure With Genetic Algorithm for Phase-Contrast X-Ray CT |
| Sub Title (in English) | |
| Keyword(1) | Phase contrast |
| Keyword(2) | X-ray CT |
| Keyword(3) | phase unwrapping |
| Keyword(4) | genetic algorithm |
| Keyword(5) | processing time |
| 1st Author's Name | Naoki SUNAGUCHI |
| 1st Author's Affiliation | Faculty of Engineering, Yamagata University() |
| 2nd Author's Name | Jin WU |
| 2nd Author's Affiliation | Institute of Clinical Medicine, University of Tsukuba |
| 3rd Author's Name | Tohoru TAKEDA |
| 3rd Author's Affiliation | Institute of Clinical Medicine, University of Tsukuba |
| 4th Author's Name | Thet Thet Lwin |
| 4th Author's Affiliation | Institute of Clinical Medicine, University of Tsukuba |
| 5th Author's Name | Akio YONEYAMA |
| 5th Author's Affiliation | Graduate School of Frontier Sciences, The University of Tsukuba |
| 6th Author's Name | Tetsuya YUASA |
| 6th Author's Affiliation | Faculty of Engineering, Yamagata University |
| 7th Author's Name | Hidekata HONTANI |
| 7th Author's Affiliation | Faculty of Engineering, Yamagata University |
| 8th Author's Name | Atsushi MOMOSE |
| 8th Author's Affiliation | Graduate School of Frontier Sciences, The University of Tsukuba |
| 9th Author's Name | Takao AKATSUKA |
| 9th Author's Affiliation | Faculty of Engineering, Yamagata University |
| Date | 2005-01-21 |
| Paper # | MI2004-61 |
| Volume (vol) | vol.104 |
| Number (no) | 579 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |