| Presentation | 2017-10-05 Pulse compression of parametric sound using M-sequence phase modulation Riku Nishioka, Hideyuki Nomura, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The application of pulse compression to parametric ultrasound using chirp modulation have been proposed to realize low-frequency ultrasound imaging. However, the application of chirp modulation to the parametric ultrasound generates sidelobes which affect signal-to-noise ratio (SNR) of image quality. In the present study, maximal length sequential (Msequential) modulation is applied to parametric ultrasound to improve the SNR of parametric ultrasound imaging. The pulse widths of pulse compressions of chirp-modulated and M-sequential modulated parametric ultrasounds directly received in water were agree well with the theoretical value. In addition, the increase of the order of M-sequential code decrease time sidelobe level of pulse compressed signal. Obtained images of a single brass rod in water indicated that although the application of chirp modulation showed time sidelobes after mainloabes, that of sixth order of M-sequential modulation reduced sidelobes around mainlobes and improved the image quality. These results suggest that the application of M-sequential modulation to the pulse compression is a useful method to improve an image quality even in low-frequency ultrasound imaging using parametric ultrasound. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Parametric ultrasound / M-sequence modulation / Pulse compression / Time sidelobe |
| Paper # | US2017-61 |
| Date of Issue | 2017-09-28 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2017/10/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Minoru Kurosawa(Tokyo Inst. of Tech.) |
| Vice Chair | Nobuyuki Endoh(Kanagawa Univ.) / Shinichi Takeuchi(Toin Univ. of Yokohama) |
| Secretary | Nobuyuki Endoh(Univ. of Toyama) / Shinichi Takeuchi(Univ. of Tokyo) |
| Assistant | Takenobu Tsuchiya(Kanagawa Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Pulse compression of parametric sound using M-sequence phase modulation |
| Sub Title (in English) | |
| Keyword(1) | Parametric ultrasound |
| Keyword(2) | M-sequence modulation |
| Keyword(3) | Pulse compression |
| Keyword(4) | Time sidelobe |
| 1st Author's Name | Riku Nishioka |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Hideyuki Nomura |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2017-10-05 |
| Paper # | US2017-61 |
| Volume (vol) | vol.117 |
| Number (no) | US-227 |
| Page | pp.pp.27-32(US), |
| #Pages | 6 |
| Date of Issue | 2017-09-28 (US) |