| Presentation | 2005-01-21 Development of transillumination laser CT system for clinical practice Ryo Takahashi, Yoshiaki Sasaki, Masaki Goto, Tetsuya Yuasa, Hidekata Hontani, Balasigamani Devaraj, Takao Akatsuka, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | So far, we have reported a transillumination laser CT using coherent detection imaging (CDI) method based on optical fiber applicable to early diagnosis of bone diseases such as rheumatoid arthritis or osteoporosis. However, the long measurement time has prevented the technique from clinical practice, because of patience imposed on a subject and/or image quality degradation by motion artifacts. To conquer the difficulty, we introduce a pair of multi-channel optical fiber arrays, in which active fibers are selected using optical switches, to maximally reduce the mechanical scanning. Also, we eliminate unnecessary beam scanning by adaptively and efficiently controlling the scanning according to the subject size. In addition, we introduce a high speed analog-to-digital converter (sampling frequency : 100 MHz) to largely reduce the data acquisition time. These improvements reduce the measurement time required to image a cross-section of human finger joint from about 30 minutes to about 6 minutes. This means that the obstacle in observation time to clinical practice has been cleared. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical Computed Tomography / Laser / Image Reconstruction / Optical Heterodyne Detection / Coherent Detection Imaging (CDI) |
| Paper # | MI2004-78 |
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| 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) | Development of transillumination laser CT system for clinical practice |
| Sub Title (in English) | |
| Keyword(1) | Optical Computed Tomography |
| Keyword(2) | Laser |
| Keyword(3) | Image Reconstruction |
| Keyword(4) | Optical Heterodyne Detection |
| Keyword(5) | Coherent Detection Imaging (CDI) |
| 1st Author's Name | Ryo Takahashi |
| 1st Author's Affiliation | Faculty of Engineering, Yamagata University() |
| 2nd Author's Name | Yoshiaki Sasaki |
| 2nd Author's Affiliation | Faculty of Engineering, Yamagata University |
| 3rd Author's Name | Masaki Goto |
| 3rd Author's Affiliation | Faculty of Engineering, Yamagata University |
| 4th Author's Name | Tetsuya Yuasa |
| 4th Author's Affiliation | Faculty of Engineering, Yamagata University |
| 5th Author's Name | Hidekata Hontani |
| 5th Author's Affiliation | Faculty of Engineering, Yamagata University |
| 6th Author's Name | Balasigamani Devaraj |
| 6th Author's Affiliation | New Focus, Inc. |
| 7th Author's Name | Takao Akatsuka |
| 7th Author's Affiliation | Faculty of Engineering, Yamagata University |
| Date | 2005-01-21 |
| Paper # | MI2004-78 |
| Volume (vol) | vol.104 |
| Number (no) | 579 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |