| Presentation | 2010-11-25 Increase in measurement accuracy of tissue displacement vector using rotation of coordinate system Chikayoshi SUMI, Kento ICHIMARU, Yusuke SHINOZUKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | By using a beam steering and an apodization properly, a higher lateral resolution echo imaging is performed by us than a conventional imaging. This is achieved by superimposing a crossed, steered beams, which we refer to as a lateral modulation (LM). The beamforming achieves almost the same accuracy in a lateral displacement measurement as that in an axial displacement measurement, i.e., a displacement vector measurement. In addition, ASTA is also proposed by us, which uses only beams with a steering angle. The simple beamforming also yields a displacement vector measurement. When performing ASTA, a spectra division must be performed to use our previously developed multidimensional autocorrelation or Doppler method. In this report, for LM and ASTA, the accuracies in displacement vector and lateral displacement measurements are evaluated through simulations and agar phantom experiments. The parameters used are, a direction of displacement vector, steering angles, and a rotation angle of the coordinate system. The change in a steering angle and rotation angle of coordinate system allows controlling frequencies in the respective directions. As a version of ASTA, the effectiveness of the disregard of low frequency spectra is also confirmed. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Lateral modulation(LM) / A steering angle(ASTA) / rotation of coordinate system / spectra frequency division / disregard of low frequency spectra |
| Paper # | US2010-82 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2010/11/18(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) | Increase in measurement accuracy of tissue displacement vector using rotation of coordinate system |
| Sub Title (in English) | |
| Keyword(1) | Lateral modulation(LM) |
| Keyword(2) | A steering angle(ASTA) |
| Keyword(3) | rotation of coordinate system |
| Keyword(4) | spectra frequency division |
| Keyword(5) | disregard of low frequency spectra |
| 1st Author's Name | Chikayoshi SUMI |
| 1st Author's Affiliation | Dept of Info and Commun Sci, Faculty of Sci and Tech, Sophia University:Dept of Electrical and Electronics Eng, Faculty of Sci and Tech, Sophia University() |
| 2nd Author's Name | Kento ICHIMARU |
| 2nd Author's Affiliation | Dept of Electrical and Electronics Eng, Faculty of Sci and Tech, Sophia University |
| 3rd Author's Name | Yusuke SHINOZUKA |
| 3rd Author's Affiliation | Dept of Electrical and Electronics Eng, Faculty of Sci and Tech, Sophia University |
| Date | 2010-11-25 |
| Paper # | US2010-82 |
| Volume (vol) | vol.110 |
| Number (no) | 306 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |