| Presentation | 1997/1/24 High resolution ultrasonic computed tomography by filtered backprojection method Iwaki Akiyama, Kiyoshi Yano, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The authors have already proposed the novel tomographic reconstruction method for phased array pulse-echo imaging. This method is based on focusing onto a circular arc by convergent beam along a phased array and divergent beam along the normal to the array. This method offers an arbitrary range hemi-spherical cross-sectional image with high resolution, it is, however, difficult for conventional B-mode image to obtain such a high resolution normal to the cross-section. We have already confirmed the fact by experiments using a steel small ball. In this paper we investigate the feasibility of this technique to the numerous number of point scatterers like a biological tissue by computer simulation. Since the received echo signals are fluctuated as a speckle region, quardrature detection is used to obtain a projection for the echoes. It is shown that a real part and an imaginary part of the projection data sets are independently applied to filtered backprojection method and reconstruct the distribution of a scatterer density. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | back projection / differential filter / phased array / speckle / quardrature detection |
| Paper # | US96-90,EA96-94 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 1997/1/24(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | High resolution ultrasonic computed tomography by filtered backprojection method |
| Sub Title (in English) | |
| Keyword(1) | back projection |
| Keyword(2) | differential filter |
| Keyword(3) | phased array |
| Keyword(4) | speckle |
| Keyword(5) | quardrature detection |
| 1st Author's Name | Iwaki Akiyama |
| 1st Author's Affiliation | Shonan Institute of Technology() |
| 2nd Author's Name | Kiyoshi Yano |
| 2nd Author's Affiliation | Shonan Institute of Technology |
| Date | 1997/1/24 |
| Paper # | US96-90,EA96-94 |
| Volume (vol) | vol.96 |
| Number (no) | 472 |
| Page | pp.pp.- |
| #Pages | 7 |
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