| Presentation | 2012-07-27 High speed echo data generation using Fourier's transform with no approximate calculations Chikayoshi SUMI, Naoto Yamazaki, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We are conducting a displacement vector measurement and an echo imaging with a high accuracy. We previously reported a high speed method for generating an echo data frame, in which fast Fourier's transform (FFT) is used. Actually, a classical synthetic aperture method was used. Using the same method, Busse performed a high speed three-dimensional echo imaging with a two-dimensional array transducer for a medical ultrasound application (simulations). We applied the classical method to achieve a rotation of the coordinate system in a case where a plane wave transmission was performed (simulations). When using an arbitrary coordinate system except for the Cartesian coordinate system such as secta, convex scanning etc, an interpolation approximation such as a linear approximation is often performed after completing a scanning in order to yield an echo data frame on the Cartesian coordinate system. For an arbitrary beamforming, however, the classical method permits the generation of such an echo data frame without performing any approximation. Such an echo data generation is effective for displaying an echo image and measuring a displacement. Also a high measurement accuracy can be obtained. These are based on the fact that an echo data can be generated at an arbitrary position with a high accuracy and a high speed. Previously, J-y Lu reported another synthetic aperture method using FFT and a wave number matching with an approximation. In this report, a new synthetic aperture method is reported, in which any approximation is not performed for the wave number matching. The newly obtained method is equivalent to the classical Fourier-based method. Through the same simulations on the coordinate rotation, the feasibility of the new method is verified. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Synthetic aperture / Fourier's transform / Cartesian coordinate system / arbitrary coordinate system / no approximation / high accuracy / high speed / echo imaging / displacement measurement / arbitrary beamforming |
| Paper # | US2012-29 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2012/7/19(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 | 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 speed echo data generation using Fourier's transform with no approximate calculations |
| Sub Title (in English) | |
| Keyword(1) | Synthetic aperture |
| Keyword(2) | Fourier's transform |
| Keyword(3) | Cartesian coordinate system |
| Keyword(4) | arbitrary coordinate system |
| Keyword(5) | no approximation |
| Keyword(6) | high accuracy |
| Keyword(7) | high speed |
| Keyword(8) | echo imaging |
| Keyword(9) | displacement measurement |
| Keyword(10) | arbitrary beamforming |
| 1st Author's Name | Chikayoshi SUMI |
| 1st Author's Affiliation | Dept of Info and Commun Sci, Faculty of Sci and Tech, Sophia University() |
| 2nd Author's Name | Naoto Yamazaki |
| 2nd Author's Affiliation | Dept of Info and Commun Sci, Faculty of Sci and Tech, Sophia University |
| Date | 2012-07-27 |
| Paper # | US2012-29 |
| Volume (vol) | vol.112 |
| Number (no) | 146 |
| Page | pp.pp.- |
| #Pages | 5 |
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